#integumentary system notes

-- located in the dermis

-- found all over the body

-- begin working immediately following birth

-- produce clear liquid called perspiration

-- perspiration consists of water and salts

-- a type of suderiferous gland

-- an accessory organ of the integumentary system

-- hair is made of keratin

-- the hair shaft projects from the skin

-- the root is embedded in the skin

-- the shape of the root determines whether hair is curly or straight

-- pigment (hair color) depends on melanocytes located in the follicle

-- the hair follicle contains the hair root

-- the hair follicle has nerve endings

-- papila = knot of capillaries that supply nutrients

-- arector pili muscles raise the hair