integumentary system= mostly skin- why do you need this?? section 21-4 pg.591-594

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Integumentary System= mostly Skin- Why do you need this?? Section 21-4 Pg.591-594

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Page 3: Integumentary System= mostly Skin- Why do you need this?? Section 21-4 Pg.591-594

Epidermis-surface layer- very outside part and are actually

dead-are rubbed off and continually replaced

-Melanin-is found here, this is a pigment that makes your skin darker- this increase when exposed to UV rays (when your outside)

Page 9: Integumentary System= mostly Skin- Why do you need this?? Section 21-4 Pg.591-594

More Function/Jobs of Skin

• Regulation of Body Temp.– Blood vessels within skin can hold or release heat– Hair can help keep heat in-getting the

Goosebumps– Have 3 million sweat glands-help in releasing heat-

through perspiration-cooling the body

Page 15: Integumentary System= mostly Skin- Why do you need this?? Section 21-4 Pg.591-594