Integumentary System

Question 1

Function of the Skin

Answer 1

Largest organ.
Provides support for the structure of the body.
Regulates temperature, removes waste as sweat, senses change in the environment (pain, pressure, touch), aids in production of vitamen D.

Question 2

3 Layers of Skin

Answer 2

Epidermis, Dermis, Hypodermis

Question 3

Epidermis

Answer 3

Seamless waterproof barrier to external environment.
Prevents excessive water loss from the body.

Question 4

Dermis

Answer 4

Provides tensile strength & elasticity of skin.
Contains nerves, sensory receptors, blood vessels that aid in regulating temperature.

Question 5

Hypodermis

Answer 5

Attaches skin to lower structures.
Acts as insulator & shock absorber.
Subcutaneous layer.

Question 6

Hair

Answer 6

Found in every region of skin except palms of hands, soles of feet, and parts of genitalia.
Helps regulate body temperature, protect surface of body (eyelashes included)

Question 7

Nails

Answer 7

Protect phalanges from trauma.
Provides mechanical support for manipulating objects.
Grow from epidermal cells in nail beds.

Question 8

3 Types of Glands

Answer 8

Sebaceous, Apocrine, Eccrine

Question 9

Sebaceous

Answer 9

Secretions maintain the softness & hydrophobicity (water repellency) of hair and skin

sebum: oily substance

Question 10

Apocrine

Answer 10

Secretions moisten skin during fear, pain, sexual arousal, emotions

Question 11

Eccrine

Answer 11

Secrete sweat to regulate body temperature