Integumentary System

Question 0

Function of the skin?

Answer 0

1. Protection
2. Blood reservoir
3. Receive stimuli
4. Temperature regulation
5. Excretion
6. Synthesis of Vit. D; helps the absorption of Calcium
7. Absorption

Question 1

Integumentary system?

Answer 1

1. Skin (largest organ of the body)
2. Hair
3. Oil glands
4. Sweat glands
5. Nails

Question 2

Layers of the skin?

Answer 2

Epidermis
Dermis
Subcutaneous

Question 3

Epidermis facts

Answer 3

Outermost layer
All epithelial tissue
Cell life = 4 weeks
Keratin - protects skin
Melanin - skin color and absorbs UV
Langerhans cells - protective cells (looks for bacteria)
Merkel cells - helps with sensory detection
Irregular melanin - freckles, moles
Friction - chalices
Fingerprints

Question 4

Dermis facts

Answer 4

"True skin"
Collagen (protein) - elastic fibers
Contains
--blood vessels
--nerve endings
--sweat & oil glands
--hair follicles
--adipose tissue
--sensory receptors
Aka dermis of animal = "Leather"

Question 5

Subcutaneous facts

Answer 5

Mostly adipose and blood vessels

Question 6

Functions of the hair?

Answer 6

1. Heat loss prevention
2. Sun protection
3. Injury
4. Foreign particles
5. Touch receptors
6. Oil glands
7. Smooth muscle fibers?
8. Color - melanin

Question 7

Oil glad facts:

Answer 7

Sebaceous

• -prevents evaporation
• -skin soft, pliable
• -inhibit bacterial growth
• -keep hair soft

Question 8

Ceruminous-?

Answer 8

A modified sweat (sudoriferous) gland that is in eat canal that produces ear wax

Question 9

Sweat gland facts:

Answer 9

Sudoriferous 
3-4 million
2 types
-eccrine
---evaporation
---eliminates waste
---emotional sweating
-apocrine
---milky or yellowish
---water, wastes, lipids, & proteins
---odorless

Question 10

Nail facts:

Answer 10

• Composition (dead, flattened, keratinized epidermal cells)
• purposes
• -grasps
• -protection for digits
• -scratching