33.3 integumentary system key concept the integumentary system has many tissues that protect the...
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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
sweatglands
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
pressurereceptors
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