the integumentary system

structure of the skin

From the outside, the skin looks plain and simple, as you can see in Figure 16.5. But at a cellular level, theres nothing plain or simple about it. A single square inch of skin contains about 20 blood vessels, hundreds of sweat glands, and more than a thousand nerve endings. It also contains tens of thousands of pigment-producing cells. Clearly, there is much more to skin than meets the eye! For a dramatic introduction to the skin, watch this video: MEDIA Click image to the left or use the URL below. URL: The skin is only about 2 mm thick, or about as thick as the cover of a book. Although it is very thin, it consists of two distinct layers, called the epidermis and the dermis. You can see both layers and some of their structures in Figure 16.6. Refer to the figure as you read about the epidermis and dermis below.

textbook_image

textbook_image

epidermis

The epidermis is the outer layer of skin. It consists almost entirely of epithelial cells. There are no blood vessels, nerve endings, or glands in this skin layer. Nonetheless, this layer of skin is very active. It is constantly being renewed. How does this happen? 1. The cells at the bottom of the epidermis are always dividing by mitosis to form new cells. 2. The new cells gradually move up through the epidermis toward the surface of the body. As they move, they produce the tough, fibrous protein called keratin. 3. By the time the cells reach the surface, they have filled with keratin and died. On the surface, the dead cells form a protective, waterproof layer. 4. Dead cells are gradually shed from the surface of the epidermis. As they are shed, they are replaced by other dead cells that move up from below. The epidermis also contains cells called melanocytes. You can see a melanocyte in Figure 16.7. Melanocytes produce melanin. Melanin is a brown pigment that gives skin much of its color. Everyones skin has about the same number of melanocytes per square inch. However, the melanocytes of people with darker skin produce more melanin. The amount of melanin that is produced depends partly on your genes and partly on how much ultraviolet light strikes your skin. The more light you get, the more melanin your melanocytes produce. This explains why skin tans when its exposed to sunlight.

textbook_image

dermis

The dermis is the inner layer of skin. It is made of tough connective tissue. The dermis is attached to the epidermis by fibers made of the protein collagen. The dermis is where most skin structures are located. Look again at Figure pain, pressure, and temperature. If you cut your skin and it bleeds, the cut has penetrated the dermis and damaged a blood vessel. The cut probably hurts as well because of the nerve endings in this skin layer. The dermis also contains hair follicles and two types of glands. You can see some of these structures in Figure 16.8. Hair follicles are structures where hairs originate. Each hair grows out of a follicle, passes up through the epidermis, and extends above the skin surface. Sebaceous glands are commonly called oil glands. They produce an oily substance called sebum. Sebum is secreted into hair follicles. Then it makes its way along the hair shaft to the surface of the skin. Sebum waterproofs the hair and skin and helps prevent them from drying out. Sweat glands produce the salty fluid known as sweat. Sweat contains excess water, salts, and other waste products. Each sweat gland has a duct that passes through the epidermis. Sweat travels from the gland through the duct and out through a pore on the surface of the skin.

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nails

Fingernails and toenails are made of specialized cells that grow out of the epidermis. They too are filled with keratin. The keratin makes them tough and hard. Their job is to protect the ends of the fingers and toes. They also make it easier to feel things with the sensitive fingertips by acting as a counterforce when things are handled.

hair

Only mammals have hair. Hair is a fiber made mainly of the tough protein keratin. The cells of each hair are filled with keratin and no longer alive. The dead cells overlap each other, almost like shingles on a roof. They work like shingles as well, by helping shed water from hair. Head hair helps protect the scalp from sun exposure. It also helps insulate the body. It traps air so heat cant escape from the head. Hair in eyelashes and eyebrows helps keep water and dust out of the eyes. Hairs inside the nostrils of the nose trap dust and germs in the air so they cant reach the lungs.

hair and nails

You may spend a lot of time and money on your hair and nails. You may think of them as accessories, like clothes or jewelry. However, like the skin, the hair and nails also play important roles in helping the body maintain homeostasis.

keeping skin healthy

What can you do to keep your skin healthy? The most important step you can take is to protect your skin from sun exposure. On sunny days, wear long sleeves and pants and a hat with a brim. Also apply sunscreen to exposed areas of skin. Protecting your skin in these ways will reduce damage to your skin by ultraviolet light. This is important because skin that has been damaged by ultraviolet light is at greater risk of developing skin cancer. This is true whether the damage is due to sunlight or the light in tanning beds. About 85 percent of teens develop acne, like the boy in Figure 16.9. Acne is a condition in which pimples form on the skin. It is caused by a bacterial infection. It happens when the sebaceous glands secrete too much sebum. The excess oil provides a good place for bacteria to grow. Keeping the skin clean helps prevent acne. Over-the-counter products or prescription drugs may be needed if the problem is serious or doesnt clear up on its own.

textbook_image

skin functions

You couldnt survive without your skin. It has many important functions. In several ways, it helps maintain homeostasis. The main function of the skin is controlling what enters and leaves the body. It prevents the loss of too much water from the body. It also prevents bacteria and other microorganisms from entering the body. Melanin in the epidermis absorbs ultraviolet light. This prevents the light from reaching and damaging the dermis. The skin helps maintain a constant body temperature. It keeps the body cool in two ways. Sweat from sweat glands in the skin evaporates to cool the body. Blood vessels in the skin dilate, or widen, increasing blood flow to the body surface. This allows more heat to reach the surface and radiate into the environment. The opposite happens to retain body heat. Blood vessels in the skin constrict, or narrow, decreasing blood flow to the body surface. This reduces the amount of heat that reaches the surface so less heat is lost to the environment.

instructional diagrams

description_image

This picture shows the layers and structure of the skin. The skin is made up of two distinct layers called the epidermis and dermis. The upper layer of the skin is called the epidermis. It is thick and tough and forms a protective layer. The epidermis consists of cells that contain a lot of keratin. The cells of the epidermis also contains cells that produce melanin which is the pigment that gives the skin much of its color. Below the epidermis, is the dermis. It is made of tough connective tissue. The dermis contains the hair follicles and sebaceous glands. Hair follicles are structures where hairs originate. Each hair grows out of a follicle, passes up through the epidermis, and extends above the skin surface. Sebaceous glands are commonly called oil glands. They produce an oily substance called sebum. Sebum is secreted into hair follicles. Then it makes its way along the hair shaft to the surface of the skin. Sebum waterproofs the hair and skin and helps prevent them from drying out. The red string like object in the diagram is the arrector pili muscle. It is a small muscle connecting a hair follicle to the dermis that contracts to make the hair stand erect in response to cold or fear.

description_image

This is the diagram of an active hair follicle. A hair follicle is a mammalian skin organ that produces hair. Hair production occurs in phases, including growth (anagen), cessation (catagen), and rest (telogen) phases. Stem cells are responsible for hair production. The shape of the hair follicle has an effect on the hair shape and texture of the individual's hair. The papilla is a large structure at the base of the hair follicle. The dermal papilla is made up mainly of connective tissue and a capillary loop. Cell division in the papilla is either rare or non-existent. Around the papilla is the germinal matrix. The root sheath is composed of an external and internal root sheath. Other structures associated with the hair follicle include the cup in which the follicle grows known as the sebaceous glands. Hair follicle receptors sense the position of the hair.

description_image

The image below shows the Layers and structures of the skin. Skin has three layers: The epidermis, the outermost layer of skin, provides a waterproof barrier and creates our skin tone. Below the dermis lies a layer of fat that helps insulate the body from heat and cold, provides protective padding, and serves as an energy storage area. The fat is contained in living cells, called fat cells, held together by fibrous tissue.

description_image

The diagram shows the layers and structures of the skin. Skin, glands, hair and nails belong to the Integumentary System. This system serves as a protective barrier that prevents internal body parts from exposure to harmful elements like ultraviolet light, extreme temperature and toxins. The skin covers the entire external surface of the human body and thus, it is the major organ of the Integumentary System. Skin has three main layers: epidermis, dermis and hypodermis. The outermost layer of the skin is the epidermis. There are no blood vessels, nerve endings, or glands in this skin layer. Nonetheless, this layer of skin is very active. It contains melanocytes that produce melanin, a brown pigment which gives the skin its color. Attached under the epidermis is the more complex structure called the dermis. This layer contains nerve endings, blood vessels and two types of glands, the sebaceous and sweat glands. The sweat produced by these glands travels out of the body through a pore on the surface of the skin. Sebaceous glands produce sebum which waterproofs the hair. Hair follicles, where hairs originate, are also found in the dermis. Each hair grows out of a follicle, passes up through the epidermis, and extends above the skin surface. Lastly, the hypodermis is the deepest layer of the skin which contains cells that serve as fat and energy storage for the body's use.

questions

The integumentary system includes the

a. skin.

b. nails.

c. hair.

-->  d. all of the above

Structures in the epidermis include

a. sebaceous glands.

b. hair follicles.

-->  c. melanocytes.

d. all of the above

How does melanin protect the dermis from ultraviolet light?

a. It reflects ultraviolet light.

-->  b. It absorbs ultraviolet light.

c. It changes ultraviolet light to visible light.

d. It changes ultraviolet light to vitamin D.

The dermis consists mainly of

a. epithelial tissue.

b. muscle tissue.

c. nervous tissue.

-->  d. connective tissue.

Which structures are found in the lower layer of skin?

a. nerve endings

b. blood vessels

c. sweat glands

-->  d. all of the above

The human skin is about 2 centimeters thick.

a. true

-->  b. false

All the cells on the surface of the epidermis are dead.

-->  a. true

b. false

People with light skin have fewer melanocytes per square inch than people with dark skin.

a. true

-->  b. false

The production of melanin in the skin is stimulated by exposure to ultraviolet light.

-->  a. true

b. false

The function of sebum is to waterproof the hair and skin.

-->  a. true

b. false

The skin helps maintain homeostasis by regulating body temperature.

-->  a. true

b. false

Sweat contains only water and salt.

a. true

-->  b. false

_The main cause of acne is eating greasy foods.

a. true

-->  b. false

When blood vessels in the skin dilate, more heat reaches the body surface.

-->  a. true

b. false

Skin damaged by ultraviolet light is at greater risk of developing cancer.

-->  a. true

b. false

Hair grows longer because it is made up of living cells.

a. true

-->  b. false

Sweat reaches the surface of the skin by traveling through hair follicles.

a. true

-->  b. false

__outer layer of the skin

a. melanocyte

b. follicle

c. sebum

d. dermis

-->  e. epidermis

f. keratin

g. skin

__tough protein that fills hair cells

a. melanocyte

b. follicle

c. sebum

d. dermis

e. epidermis

-->  f. keratin

g. skin

__skin structure where a hair originates

a. melanocyte

-->  b. follicle

c. sebum

d. dermis

e. epidermis

f. keratin

g. skin

__major organ of the integumentary system

a. melanocyte

b. follicle

c. sebum

d. dermis

e. epidermis

f. keratin

-->  g. skin

__oily substance secreted by glands in the skin

a. melanocyte

b. follicle

-->  c. sebum

d. dermis

e. epidermis

f. keratin

g. skin

__inner layer of the skin

a. melanocyte

b. follicle

c. sebum

-->  d. dermis

e. epidermis

f. keratin

g. skin

__type of cell that produces a brown pigment in skin

-->  a. melanocyte

b. follicle

c. sebum

d. dermis

e. epidermis

f. keratin

g. skin

Functions of the integumentary system include

a. maintaining a stable body temperature.

b. preventing the body from drying out.

c. keeping bacteria out of the body.

-->  d. all of the above

The outer layer of the skin contains

a. blood vessels.

b. nerve endings.

c. sweat glands.

-->  d. melanocytes.

The epidermis consists almost entirely of

-->  a. epithelial tissue.

b. connective tissue.

c. muscle tissue.

d. nervous tissue.

The dermis is attached to the epidermis by

-->  a. collagen fibers.

b. muscle fibers.

c. keratin fibers.

d. nerve fibers.

What is the function of sebum?

a. keeping the body cool

b. absorbing ultraviolet light

-->  c. waterproofing the hair and skin

d. none of the above

The major cause of acne is

a. exposure to sunlight.

-->  b. infection by bacteria.

c. overproduction of sweat.

d. lack of sleep.

The dermis contains all of the following except

a. sebaceous glands.

b. hair follicles.

-->  c. melanin-producing cells.

d. sweat glands.

diagram questions

question_image

Identify U

-->  a. DERMIS

b. FOLLICLE

c. EPIDERMIS

d. SWEAT GLAND

question_image

Which structure helps in the hair movement?

a. L

b. S

-->  c. J

d. W

question_image

If you are told this is a drawing of human skin layers, what do you think object N represents?

a. FATTY TISSUE

-->  b. A HAIR

c. BLOOD VESSEL

d. SWEAT GLAND

question_image

What is the part of the hair follicle corresponding with the letter W?

a. HAIR MATRIX

-->  b. SEBACEOUS GLAND

c. CUTICLE

d. HAIR BULB

question_image

What does W represent?

a. HAIR SHAFT

-->  b. SEBACEOUS GLAND

c. HAIR BULB

d. CUTICLE

question_image

Which letter represents the hair papilla?

a. F

b. W

c. V

-->  d. U

question_image

Which label refers to the bulge?

a. K

-->  b. N

c. R

d. V

question_image

Which label refers to the hair bulb?

a. K

-->  b. R

c. V

d. L

question_image

What is located in the hair bulb?

a. ARRECTOR PILI MUSCLE

b. SEBACEOUS GLAND

-->  c. FOLLICULAR PAPILLIA

d. BULGE

question_image

Which part attaches to the bulge?

-->  a. V

b. K

c. R

d. J

question_image

Which label refers to the dermic?

a. W

b. F

-->  c. S

d. X

question_image

Which letter represents the follicle Papilla?

a. W

b. U

c. J

-->  d. H

question_image

Identify the epidermic skin layer:

a. S

b. W

-->  c. X

d. F

question_image

Which label refers to the sebum?

-->  a. D

b. A

c. Y

d. C

question_image

Which label represents the hair?

a. D

-->  b. C

c. A

d. L

question_image

What label represents the hair?

a. A

b. D

c. L

-->  d. C

question_image

Identify the papilla

-->  a. L

b. C

c. F

d. D

question_image

What is the Hair Follicle part labeled A?

-->  a. HAIR BULGE

b. HAIR BULB

c. HAIR SHAFT

d. PAPILLA

question_image

Which structure helps in the hair shaft (D) movement?

-->  a. U

b. L

c. F

d. Y

question_image

By what letter is the hair matrix represented in the diagram?

a. P

-->  b. J

c. T

d. Y

question_image

Identify the medulla

a. F

b. J

c. Y

-->  d. W

question_image

What does the letter P represent?

a. ECCRINE SWEAT GLAND

-->  b. PORES

c. SKIN SURFACE

d. DERMIS

question_image

Which label refers to the vein?

a. K

b. X

-->  c. S

d. R

question_image

Which of the labeled elements shows the epidermis?

-->  a. R

b. X

c. K

d. N

question_image

Where is the hair follicle?

a. E

-->  b. U

c. J

d. L

question_image

Which part produces melamine?

a. T

-->  b. E

c. H

d. U

question_image

Where is the sweat gland?

a. K

b. X

c. R

-->  d. F

question_image

Which letter is representative of the Epidermis in this diagram?

-->  a. M

b. X

c. Y

d. K

question_image

What is the top layer of skin called?

a. FAT

b. SENSORY NERVE

-->  c. EPIDERMIS

d. DERMIS

question_image

Where can you find the most amount of adipose tissue?

a. L

-->  b. P

c. K

d. M

question_image

Identify the dermis

a. D

b. Y

-->  c. J

d. J

question_image

Which label shows the Blood Vessels?

a. Y

b. D

-->  c. R

d. H

question_image

What is the part of this diagram represented with the letter H?

a. SWEAT GLAND

b. VENULE

-->  c. SWEAT PORE

d. MATRIX

question_image

Which label refers to the matrix?

a. H

-->  b. K

c. Y

d. E

question_image

Where is the connective tissue?

a. A

-->  b. D

c. N

d. X

question_image

Which letter indicates the pore that allows sweat to form on the skin?

-->  a. H

b. S

c. Y

d. T

question_image

Which letter corresponds to the part that releases sweat outside the skin?

a. T

b. C

-->  c. H

d. Y

question_image

What layer of skin is found below the Epidermis labeled U?

-->  a. DERMIS

b. SWEAT GLAND

c. PORE

d. HYPODERMIS

question_image

Which letter represents the Pore?

-->  a. D

b. S

c. A

d. L

question_image

What is between U and T?

a. D

-->  b. X

c. A

d. L

question_image

What comes after the epidermis?

a. Hair Fiber

-->  b. Dermis

c. Dermal Papilla

d. Subcutaneous Fat

question_image

What is the outer layer of the skin?

a. outer root sheath

b. Subcutaneous fat

-->  c. Epidermis

d. Dermis

question_image

In which layer of the skin does the sebaceous gland lie?

a. subcutaneous fat

-->  b. Dermis

c. dermal papilla

d. epidermis

question_image

What layer of skin contains the Sebaceous gland?

a. Epidermis

b. Bulge Region

c. Subcutaneous fat

-->  d. Dermis

question_image

How many parts does the skin consist of?

a. 2

-->  b. 3

c. 4

d. 1

question_image

What produces an oily substance like sebum?

a. bulge region

b. dermal papilla

c. epidermis

-->  d. sebaceous gland

question_image

Which part protects the outer hair?

a. Dermal papilla

-->  b. Outer root sheath

c. Bulge region

d. Inner root sheath

question_image

What is the layer of skin that the hair shaft emerges from called?

-->  a. Epidermis

b. Inner root sheath

c. Sebaceous gland

d. Papilla

question_image

What pushes through the epidermis?

-->  a. Hair shaft

b. Root

c. Inner tissue sheath

d. Connective tissue sheath

question_image

Which part is located between the muscle arrecteur pili and the epidermis?

a. Connective tissue sheath

b. Papilla

-->  c. Sebaceous gland

d. Root of hair

question_image

How many parts of the hair are described in the diagram?

a. 5

b. 6

-->  c. 8

d. 9

question_image

How many parts does the hair consist of?

-->  a. 5

b. 6

c. 4

d. 7

question_image

What creates and secretes sebum?

a. inner root sheath

b. papilla

c. epidermis

-->  d. sebaceous gland

question_image

Identify which is not part of hair shaft.

a. Cuticle

b. Medulla

c. Cortex

-->  d. hair matrix

question_image

The part that comes before the Hair shaft?

-->  a. Sebaceous gland

b. Inner root

c. Arrector pili muscle

d. Outer root

question_image

Which of the following is not part of the hair bulb?

a. Hair matrix

-->  b. Sebaceous gland

c. Hair papilla

d. Outer root sheath

question_image

How many parts do the hair shaft have?

a. 2

b. 1

c. 4

-->  d. 3

question_image

Which gland causes greasy hair?

a. Cortex

b. Hair shaft

c. Hair bulb

-->  d. Sebaceous gland

question_image

Which structure secretes oil?

-->  a. Sebaceous gland

b. Bulge

c. Arrector pili muscle

d. Hair bulb

question_image

How many of these aren't muscles?

a. 3

b. 2

-->  c. 4

d. 1

question_image

How many parts of the skin are named in the diagram?

a. 2

-->  b. 5

c. 4

d. 3

question_image

What's in between sebaceous gland and bulge?

a. hair bulb

b. nothing is in between

-->  c. arrector pili muscle

d. follicular papillia

question_image

Identify the other name for oil glands.

a. Pores

b. Sweat Gland

c. Dermis

-->  d. Sebaceous Gland

question_image

Identify the layer that's always renewing, although it doesn't have any blood vessels or nerve endings.

a. Oil Gland

b. Subcutaneos fatty tissue

c. Dermis

-->  d. Epidermis

question_image

What are the pores connected to?

a. Blood Vessels

-->  b. Sweat Gland

c. Hair

d. Oil Gland (Sebaceous Gland)

question_image

What is another name for the sebaceous gland?

a. Pore

-->  b. Oil Gland

c. Sweat Gland

d. Blood Vessel

question_image

How many glands are in the human skin?

a. 3

b. 5

-->  c. 2

d. 1

question_image

What is the outer layer of skin?

a. Arrector Pili Muscle

b. Infudibulum of the Sebaceous gland

-->  c. epidermic

d. Dermic

question_image

What forms the base of the hair follicle?

a. Arrector Pili Muscle

b. The Bulge

c. Epidermis

-->  d. Hair Bulb

question_image

What is the name of the first layer of skin?

a. Dermic

b. Fibrous tract

c. The bulge

-->  d. Epidermic

question_image

Which structure in the skin produces melanin?

a. Hair bulb

-->  b. Melanocytes

c. Epidermic

d. Fibrous tract

question_image

How many layers does the root sheath have?

a. 5

b. 1

-->  c. 2

d. 3

question_image

What is the outermost layer called?

a. fibrous tract

b. outer root sheath layer

-->  c. epidermic

d. arrector pili muscle

question_image

What is the outermost part of the epidermis?

a. follicle

b. sebaceous gland

-->  c. skin surface

d. sebum

question_image

From where does hair grow?

a. Skin surface

b. Sebum

-->  c. Follicle

d. Sebaceous gland

question_image

What is the layer below the follicle?

-->  a. Sebaceous gland

b. Hair

c. Sebum

d. Skin Surface

question_image

How many structures related to hair are under the skin surface?

a. 1

-->  b. 3

c. 2

d. 4

question_image

What is in between the skin surface and the follicle?

a. nothing is in between

b. sebaceous gland

-->  c. sebum

d. hair

question_image

Identify which part of the hair comes through the skin?

a. Hair Bulb

-->  b. Hair Shaft

c. Hair Papilla

d. Hair Root

question_image

What is inside the hair bulb?

a. sebaceous gland

b. arrector pili muscle

c. apocrine sweat gland

-->  d. hair matrix

question_image

How many hairs can you see?

-->  a. 6

b. 8

c. 10

d. 2

question_image

What produces sebum?

a. Hair bulb

-->  b. Sebaceous Gland

c. Arrector pili muscle?

d. Buldge

question_image

What is the uppermost layer of skin called?

-->  a. Epidermis

b. dermis

c. subcutaneous tissue

d. papilla

question_image

What is the outer layer of skin called?

a. Subcutaneous Tissue

b. Dermis

-->  c. Epidermis

d. Papilla

question_image

What is the outer layer of the skin called?

a. Subcutaneous tissue

b. Dermis

-->  c. Epidermis

d. Papilla

question_image

How many hairs contains the epidermis?

a. 4

-->  b. 1

c. 3

d. 2

question_image

What is the outermost layer called?

-->  a. epidermis

b. dermis

c. papilla

d. subcutaneous tissue

question_image

Identify which of the following is not part of the epidermis.

a. Stratum Corneum

-->  b. Fat

c. Basal Cell Layer

d. Granular Cell Layer

question_image

From the diagram, identify the part which refers to the outer layer of the skin.

-->  a. epidermis

b. fat tissue

c. subcutaneous tissue

d. dermis

question_image

What is the layer directly below the Epidermis?

a. Granular Cell Layer

b. Subcutaneous Tissue

c. Basal Cell Layer

-->  d. Dermis

question_image

How many parts are there to this human skin diagram?

a. 20

-->  b. 17

c. 16

d. 15

question_image

How many types of cell layer are shown in the diagram?

a. 3

b. 1

-->  c. 4

d. 2

question_image

Is the sweat gland essential for human skin?

a. Cannot determine from the given information

b. No

c. Maybe

-->  d. Yes

question_image

What is right underneath the epidermis?

a. artery

-->  b. dermis

c. vein

d. hair

question_image

What is the first stage of this diagram?

a. Matrix cells

b. Hair shaft

-->  c. Dermal papilla

d. Bulge

question_image

What does sebaceous gland do?

a. It it holds the dirt from surface

b. It holds the hair

c. It produces hormones to help the growth of hair

-->  d. Produce oil to prevent the prevents bacteria and other microorganisms from entering the pores

question_image

What is the named part in the diagram responsible for producing sebum?

-->  a. sebaceous gland

b. dermal papilla

c. matrix cells

d. bulge

question_image

The melanocytes are located in?

a. Dermis

-->  b. The hair shift

c. Matrix cells

d. Exodermis

question_image

How many hairs are there?

a. 3

-->  b. 1

c. 2

d. 4

question_image

What part helps to prevent the skin from drying?

a. matrix cells

b. bulge

-->  c. sebaceous gland

d. hair shaft

question_image

What is underneath the Epidermis?

-->  a. Dermis

b. Muscle

c. Adipose Tissue

d. Nerve

question_image

Which layer of skin is the deepest?

a. Nerve

b. Epidermis

-->  c. Subcutaneous Layer

d. Dermis

question_image

How many parts are there that make up the skin?

a. 13

b. 15

c. 12

-->  d. 14

question_image

What transfers sweat to the epidermis?

a. Sebaceous gland

-->  b. Sweat Duct

c. Sweat gland

d. Sensory Nerve Endings

question_image

What part of the skin produces sebum?

a. cortex

b. hair matrix

c. arrector pili muscle

-->  d. sebaceous gland

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What part produces an oily substance called sebum?

-->  a. Sebaceous Gland

b. Medulla

c. Inner root sheath

d. Outer root sheath

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Where did the hair enter the skin?

a. hair matrix

b. hair papilla

c. inner root sheath

-->  d. medulla

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How many strands of hair are shown in the diagram?

a. 2

b. 3

c. 4

-->  d. 1

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From the diagram, which part refers to the outer layer of the skin?

a. hypodermis

b. pore

-->  c. epidermis

d. dermis

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What part of the dermis secretes sebum?

a. Adipose tissue

b. Hair root

c. Arrector pili muscle

-->  d. Sebaceous gland

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How many hairs are in the diagram?

a. 4

b. 5

c. 7

-->  d. 6

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What is the outermost layer of the skin called?

a. vein

b. hypodermis

-->  c. dermis

d. epidermis

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What is at the end of eccrine sweat gland?

a. nothing

b. skin surface

c. hair

-->  d. pores

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What kind of glands are responsible for the acne in the adolescence?

a. Eccrine sweat glands

b. Apocrine sweat glands

-->  c. Sebaceous glands

d. Melanocytes

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What is the outer layer of the skin called?

-->  a. Epidermis

b. Fatty tissue

c. Hair shaft

d. Oil gland

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What layer of the skin is between the epidermis and the subcutaneous tissue?

a. squamous cells

-->  b. dermis

c. lymph vessel

d. fatty tissue

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How many layers does the skin have?

a. 4

b. 3

c. 1

-->  d. 2

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What is the outermost layer of the skin called?

a. subcutaneous tissue

b. lymph vessel

-->  c. dermis

d. epidermis

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Where hair grows from?

a. Capillary

b. Atery

-->  c. Follicle

d. Sweat pore

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What lies between the hair shaft and the melanocyte?

a. dermis

b. sweat pore

c. capillary

-->  d. epidernis

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How many skin layers are there?

a. 1

b. 2

c. 4

-->  d. 3

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What happens when the sebaceous glands secrete too much sebum?

-->  a. Bacterial infection may develop and cause acne.

b. The skin will become dry and flaky.

c. The skin will become sunburned.

d. The body will become overheated.

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Which layer of skin would you find directly below the epidermis?

a. Hair shaft

-->  b. Dermis

c. Sweat pore

d. Subcutaneous Tissue

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Melanocytes are located at the bottom of which of the following structures?

a. Blood vessel

b. Hair follicle

c. Dermis

-->  d. Epidermis

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What are the names of the cells contained in epidermis?

a. Dendrites

-->  b. melanocytes

c. Glucocytes

d. Blood vessels

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What lies below the hair follicle?

a. blood vessel

b. epidermis

-->  c. fat

d. sweat gland

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Which layer borders the fat layer?

a. the sweat gland

b. the outer layer

c. the epidermis

-->  d. The dermis

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From the diagram, how many layers of the skin are there?

a. 4

b. 3

-->  c. 2

d. 1

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How many layers make up a skin cell?

a. 4

-->  b. 3

c. 2

d. 1

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What is the major organ of the Integumentary System?

a. The knee is the major organ of the integumentary system.

b. The hair is the major organ of the integumentary system.

-->  c. The skin is the major organ of the integumentary system.

d. The blood is the major organ of the integumentary system.

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What is the outermost layer of the skin called?

a. fibroblasts

b. epidermis

-->  c. dermis

d. fat

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What is the outermost layer of the skin called?

-->  a. dermis

b. elastin

c. collagen

d. epidermis

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Oil Glands can be found in the:

a. Epidermis

-->  b. Dermis

c. Fatty Tissue

d. Elastin

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In what layer of the skin would you find Collagen?

a. Epidermis

b. Hair shaft

-->  c. Dermis

d. Fatty tissue

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How many layers are there to the body's skin?

a. 2

-->  b. 3

c. 4

d. 1

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How many skin layers are shown in the diagram below?

a. 6

-->  b. 3

c. 12

d. 9

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The hair shaft extends up to which layer of the skin?

-->  a. Dermis

b. Epidermis

c. Sebaceous Gland

d. Fatty Tissue

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What structure secretes perspiration?

a. Follicle

b. Fatty tissue

-->  c. Sweat gland

d. Oil gland

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This gland produces sweat.

a. Melanocytes

-->  b. Sweat gland

c. Follicle

d. Oil gland

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What is the outer layer of the skin called?

a. fatty tissue

b. melanocytes

-->  c. Epidermis

d. oil gland

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What is the topmost layer of the skin?

a. Oil Gland

-->  b. Epidermis

c. Dermis

d. Fatty Tissue

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How many hairs shown?

a. 7

b. 5

c. 1

-->  d. 3

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How many layers of skin are there?

-->  a. 3

b. 4

c. 2

d. 6

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Skin pigments are contained in what layer of the skin?

a. Sweat Gland

b. Fatty Tissue

-->  c. Epidermis

d. Dermis

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Which is the deepest layer of the skin?

-->  a. Subcutaneous

b. Bottom

c. Epidermis

d. Dermis

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What is at the end of the sweat gland?

a. hair shaft

b. venule

c. pilo erectile muscle

-->  d. sweat pore

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What structure is the sweat pore connected to under the skin?

a. Matrix

b. Venule

c. Hair Shaft

-->  d. Sweat gland

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Which gland surrounds the hair shaft?

a. Connective tissue

b. Sweat gland

c. Venule

-->  d. Sebaceous gland

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How many hairs shown?

a. 1

-->  b. 2

c. 4

d. 3

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How many layers make up the skin?

-->  a. 3

b. 1

c. 2

d. 4

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What is the outermost layer of the skin called?

a. connective tissue

b. subcutaneous tissue

-->  c. dermis

d. epidermis

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What are the small yellow bubbles in the diagram?

a. epidermis

-->  b. nerves

c. pore

d. sweat gland

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What is the opening of a sweat gland called?

a. Hypodermis

b. Dermis

c. Epidermis

-->  d. Pore

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What will you find at the bottom of the sweat duct?

a. prickle sensors

b. nerves

c. pore

-->  d. sweat gland

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What connects the pore to the sweat gland?

a. nerves

-->  b. sweat duct

c. hair follicle

d. epidermis

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It is the layer of skin which contains melanocytes.

a. Hypodermis

-->  b. Epidermis

c. Hair

d. Dermis

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How many parts does the scalp have?

-->  a. 1

b. 8

c. 14

d. 12

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This produces a salty liquid known as sweat that helps the body release excess water and sweat from the body

a. hair shaft

b. artery

-->  c. sweat gland

d. dermis

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What is the name of the middle layer of the skin?

a. The subcutis

-->  b. The dermis

c. The epidermis

d. The hair follicle

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What is the top layer of skin called?

a. Sweat pore

b. Nerve fiber

-->  c. Epidermis

d. Dermis

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How many layers does the human skin have?

a. 5

b. 15

c. 16

-->  d. 3

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How many parts of epidermis are there?

a. 1

b. 3

c. 2

-->  d. 4

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What is the outermost layer of the skin called?

a. subcutis

b. epidermis

-->  c. dermis

d. erector muscle

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What is J labeling in this diagram

-->  a. HAIR SHAFT

b. BULGE

c. DERMIC

d. SKIN

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Where is the hair follicle found?

a. hair

b. skin

c. nerve

-->  d. dermis

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Where is the sweat gland found?

-->  a. dermis

b. hypodermis

c. epidermis

d. Prickle sensors

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Identify the hair matrix

a. H

-->  b. Y

c. R

d. P