Chapter 5: Integumentary System Flashcards Preview

ANPH 150 > Chapter 5: Integumentary System > Flashcards

Flashcards in Chapter 5: Integumentary System Deck (27)
Loading flashcards...
0

Integumentary system

Consist of skin, hair, nails and exocrine glands

1

Skins two layers

Epidermis

Dermis

2

Skins function

Protection from external environment

Temperature regulation

Vitamin D production

Tactile sensations

Small amount of excretion and absorption

3

Dermis

Inner deep layer composed of connective tissue. Contains blood vessels, sweat glands, sebaceous glands, nerve endings, hair follicles.

4

Hypodermis

The layer beneath the skin. Contains mostly adipose tissue which helps to insulate the body from the outside temperatures. Acts as an energy reservoir. Subcutaneous

5

Epidermis

Outermost layer, consists of stratified, squamous epithelial tissue. Contains no blood vessels. Avascular.

6

Stratum basale

Inner most epidermal layer. Stem cells continuously undergo cellular division and push older cells to the surface

7

Keratinization

Keratin gets added to the cells, making them tough, harder and easier to slough off

8

Melanocytes

Produce melanin

The more melanin that is produced the darker the skin or hair color

Melanin protects deeper tissues from harmful UV radiation from the sun

9

Hair

Function

Protective

Found everywhere on the body except palms, soles, lips, nipples and some areas of the genitals

It provides insulation against heat and cold

10

Hair follicle

Hair portion that has nerve and blood supply

11

Hair bulb

Part of hair anchored in the dermis layer

12

Hair papilla

Nourishes each hair

13

Arrector pili

Muscle that contracts causing hair to "stand on end"

14

Hair shaft

Visible portion of hair

15

Nail function

Protective

Scratching

Grasping small objects

16

Nail composition

Hard packed keratinized epithelial cells

17

Nail

Free edge

End of the nail

18

Lunula

White crescent shape at the base of nail

19

Nail
Cuticle

Folds of skin surrounding the nail body

20

Nail bed

Under the nail

21

Nail root

Where cells divide, growth occurs and nail is pushed forward

22

Eccrine

Sweat produced to help cool the body and eliminate some wastes

23

Apocrine

Sweat produced in response to stress, begins to function at puberty

24

Sebaceous glands

Secretes sebum, which keeps hair and skin from drying out

25

Ceruminous glands

Secretes ear wax, prevents the ear canal from drying out

26

Cerumen

Earwax