Integumentary System

Epidermis

Outermost layer of skin

Functions of the Integumentary System Include:

Protection, Body Temperature Regulation, Excretion (Perspiration), Perception of Stimuli/Tactile, Receptors (Sensation of: Pain, Temperature, Pressure, and Touch)

Dermis

Contains: blood vessels, nerve fibers, hair follicles, sebaceous (oil) glands, and sudoriferous (sweat) glands.

Subcutaneous Layer

Aka: Hypodermis, Deepest layer of skin, Stores fat, insulates, protects and connects the skin to the muscle.

Glands:

Sebaceous (oil) are all over the body except on palms and soles (glabrous skin), Sudoriferous (sweat) tiny glands that release Perspiration through pores to decrease body heat.

Nails

Composed of hard keratin

Burns

1st: redness/sensitivity (ex: sunburn)

2nd: redness/sensitivity/blisters

3rd: Epidermis and Dermis are destroyed, which can be partially painless due to nerve damage

Acne

inflamed sebaceous glands cause pimples

Albinism:

inherited - prevents normal amount of melanin production, extremely pale skin and white hair

Cyanosis

abnormal bluish discoloration of the skin caused by lack of oxygen

Keloid

abnormally thick scar

Tinea

Skin infection caused by a fungus (ex: ringworm, athletes foot)

Gangrene

necrosis of tissue

Scratch Test

used to identify allergies

Dermatologist

Physician who diagnoses and treats conditions and disease of the skin, hair, and nails, they occasionally perform surgery.