Accessory Structures of the
Skin
Hair, Nails, Sweat Glands, Etc!
HAIR!
Hair grows within a hair follicle
(layer of epidermal cells which is in
the epidermis to the dermis)
Hair roots are embedded in the skin
and have a blood supply. Grow and
reproduce to lengthen hair.
Hair shafts are the dead, keratinized
cells we see as “hair”
Make a basic
drawing of hair
here!!
Arrector pili!
Smooth Muscle
Attached to hair follicles
Muscle contracts when cold or
upset
Makes your hair stand up and
goosebumps
NAILS!!
Nail plate is the portion of the nail
exposed to the skin
Nail bed is attached to the skin
Lunula: whitish crescent on some
peoples nails. Most active growing
region
Keratinized as well
GLANDS!
Sebaceous gland
Around the hair follicles
Produce oils to make skin
waterproof
Exits at “Pores”
Not on palms or soles of feet
Cause of Acne!!!
Sweat Glands (2 types)
Eccrine glands: the water released
by the body to cool the body.
Located all over body.
Apocrine glands: skin bacteria
cause this kind of sweat to smell.
Develop during puberty. Located
in armpits, groin area, and chest
around hair follicles.
Ceruminous glands: modified
sweat glands which produce
earwax. Located in the ear
canal.
Mammary glands: modified
sweat glands which produce
milk in females. Located on
the breast.