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Flashcards in Integumentary System Deck (169)
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What is an Arrector pili

A small muscle located parallel to hair follicle. Looks like a string

1

What is a hair shaft?

The actual tube of hair. All the cells of the shaft are dead

2

Sebaceous gland

A gland next to a hair follicle that secretes sebum. Looks like a weird face from side veiw

3

What is a hair root?

The part of the hair that contains both the cuticle, cortex, medulla and the hair matrix, dermal papilla, and melanocytes

4

Hair bulb

The hair bulb contains the dermal papilla, melanocytes and the hair matrix

5

What is the medulla?

The inner most layer of the hair. Contains air pockets and large cells

6

What is the cortex

The layer of the hair that is intermediate the medulla and cuticle. Contains melanin, hair color

7

What is the cuticle?

The outermost layer of the hair. Keratinized

8

What is the internal root sheath?

It lairs out side the cuticle. In the follicle.

9

What is the external root sheath?

Lies out side the internal root sheath in the hair follicle. Sometimes called the epithelial root sheath

10

What is the glassy membrane?

Membrane that lies out side of the external tooth sheath.

11

What is the peripheral CT?

Also known as the fibrous sheath. It lies outside of the glassy membrane. It's the outer most layer

12

What is the follicle wall?

Consists of the internal root sheath all the way to the peripheral CT. Parts of the follicle that do not involve the hair itself.

13

What is the hair matrix?

The area of the hair bulb that produces the hair. On top of the dermal papilla

14

What is the dermal papilla?

The little nub of dermis that supplies the hair matrix with nutrients.

15

What is a melanocyte?

A cell found on the lateral sides of the dermal papilla responsible for giving hair color. Looks like moose antlers

16

Where does the hair follicle start?

The dermis

17

Hairs act as..

Sensitive touch receptors

18

Hairs are called..

Pili

19

The only live part of the hair is.

The matrix

20

The epidermis is composed of what layers?

1. Stratum basale
2. Stratum spinosum
3. Stratum granulosum
4. Stratum lucidum (thick skin)
5. Stratum cornea

21

Stratum basale

Where cells are produced

22

Stratum spinosum

Spiny-cells, keratinization starts here

23

Stratum granulosum

Flat cells, visible keratin granules. Cells are starting to die

24

Stratum lucidum

Only found in thick skin. Clear layer

25

Stratum corneum

"Horny layer" the outer most layer of scales. Completely dead and keratinized

26

The skin is composed of..

- the epidermis
- the dermis

27

What are the layers of the dermis?

1. Reticular layer
2. Papillary layer

28

Hypodermis

Not part of the skin, beneath the dermis, composed of adipose tissue; which anchors the skin, protects from infection and insulates.

29

What type of et tissue is the epidermis?

Stratified Squamous et