33.3 Integumentary System KEY CONCEPT The integumentary system has many tissues that protect the body.

33.3 Integumentary System The integumentary system helps maintain homeostasis. The integument is the body system that surrounds all your other organ systems.

33.3 Integumentary System The integumentary system helps maintain homeostasis. The integumentary system consists of many parts. –skin –hair –nails –oil glands –sweat glands –proteins, such as keratin

33.3 Integumentary System Integumentary system removes substances from the body. –water –salts –urea pore sweat glands

33.3 Integumentary System The outermost layer of the skin is the epidermis. –dead skin cells –oils –pores The integumentary system consists of many different tissues. epidermis pore

33.3 Integumentary System –Keratin makes cells waterproof and tough feeling. Cells in the epidermis produce keratin and melanin. –Melanin is a dark pigment that absorbs UV rays.

33.3 Integumentary System –sweat glands –oil glands –pressure receptors –blood vessels –hair follicles The dermis contains most of the tissues in the skin. dermis hair follicle oil gland pressure receptors sweat gland

33.3 Integumentary System The dermis also produces elastin and collagen. A hair follicle is pit of cells that produces hair. – Elastin makes skin flexible. – Collagen gives skin its shape.

33.3 Integumentary System Beneath the dermis is a layer of fat. fat layer