Class 5: The Skin Flashcards Preview

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Flashcards in Class 5: The Skin Deck (61)
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1

Integumentary System consists of

hair, nails, and cutaneous glands

2

Skin is the most...

vulnerable organ

3

Skin is the body's largest and heaviest...

organ

4

hypodermis is a

connective tissue layer below the dermis

5

Functions of skin

-resist trauma and infection
-synthesize vitamin D
-sensation
-thermoregulation
-transdermal absorbtion

6

Epidermis is composed of

keratinized stratified squamous epithelium

7

The epidermal water barrier is...

Critical to retaining water in the body and preventing dehydration. Makes us waterproof.

8

Cells above the water barrier quickly...

die

9

5 types of cells of the epidermis are (deepest to most superficial)

-stem cells
-keratinocytes
-melanocytes
-tactile (merkel) cells
-dendritic (langerhans) cells

10

Outer layers of epidermis to inner

-Stratum Corneum
-Stratum Lucidum
-Stratum Granulosum
-Stratum Spinosum
-Stratum Basale

11

How many days does it take for a keratinocyte to make its way to the skin surface and flake off?

30-40 days

12

Dermis location, type of tissue

connective tissue layer beneath the epidermis

13

Dermis is composed of mainly

-collagen with elastic fibers
-reticular fibers
-fibroblasts

14

The Dermis is well supplied with

blood vessels, sweat glands, sebaceous glands, and nerve endings

15

what is rooted in the dermis?

hair follicles and nail roots

16

what type of muscle is associate with hair follicles?

smooth muscle (piloerector muscles)

17

Hypodermis is what type of tissue?

subcutaneous

18

Hypodermis functions

-Pads the body
-binds the skin to underlying tissues
-absorbs injected drugs
-contains subcutaneous fat

19

melanin affects

skin color

20

people of different skin color have the same or different number of melanocytes?

same

21

Melanin amount varies with exposure to

UV rays of sunlight

22

Blueness of the skin is called

cyanosis

23

redness of the skin is called

erythema

24

pale or ashen skin is called

pallor

25

yellowing of the skin is called

jaundice

26

friction ridges are the markings on the...

fingertips that leave oily fingerprints

27

flexion lines are...

lines on the flexor surfaces of the digits, palms, wrists, and elbows

28

freckles and moles are made up of what?

tan to black aggregations of melanocytes

29

hemanglomas are

birthmarks

30

hemanglomas (birthmarks) are caused by

benign tumors of dermal blood capillaries