SPANGLER SCIENCE

Integumentary System Notes
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Function: Protects The body by preventing loss of water, holds moisture in. 

Protects from injury and infection, keeps stuff in and out.

Helps regulate the body temperature, thermoregulator. 

Eliminates waste, sweat.

Gathers information about the environment, through nerves. (pressure, pain & temp.)

Produces Vitamin D (sunlight needed)


Structure: Two layered

Epidermis: outermost layer. Epitheleal tissue.

Has no nerves or blood vessels. Thin layer (2mm)

Melanin: in epidermis. Produces color substance pigment

the more melanin, the darker the skin.

Exposure to the sun stimulates melanin production.

Dermis: Lower layer of skin. Thicker than epidermis. 

Connective tissue. Has nerves and blood vessels. 

Feels heat, cold, pain and pressure. Hands, lips and soles have most nerves. 


skin2.jpg

Hair: living cells in hair follicle, non living further out. 

protects the body from ultraviolet light

keeps particles off the skin

color from melanin. most from black melanin unless red hair-red melanin.

Nails: protect ends so can stay soft for touch.

epitheleal tissue.


Keeping the skin healthy: proper diet, drink enough water, limit sun exposure & keep skin clean and dry.

Damage: blisters, cuts, genetic make-up: tumors,cancer


*Touch is the most widely spread sense



 

 

W.T. Eich Intermediate