accessory skin structures Flashcards
hair is found everywhere on body EXCEPT
palms
soles
lips
nipples
parts of external genitalia
distal segment of fingers and toes
part of hair above skins surface
shaft
part of hair below skins surface
root
3 layers of hair from in out
- medulla
- cortex
- cuticle
medulla
central axis
soft keratin
cortex
forms bulk of hair
hard keratin
cuticle
surface of hair
single layer of hard keratin
hair bulb
where hair growth stems from
in stages
growth and rest
Arrector Pilli
smooth muscle
when contracts makes hair stand on end
Sebaceous Glands
produce sebum that oils skins surface and hair
empty into hair follicle
holocrine gland
Eccerine gland
most common sweat gland
empty directly into skin
where are eccerine glands most abundant
palms of hands and feet
Apocrine gland
become active at puberty
secrete organic compounds that are odorless and become odorful when interact with bacteria on skin
shape of eccerine gland
simple, coild tubular
shape of apocrine gland
compound coiled tubular