Vocabulary Matching
anagen phase
cells divide rapidly at the root of the hair, pushing the hair shaft up and out
arrector pili muscle
attached to the hair follicle
catagen phase
marks a transition from the hair follicle's active growth
cortex
the second layer making up most of the hair shaft
cuticle
the outermost layer made of shingle-like scales protecting the hair shaft
hair
dead, keratinized cells
hair bulb
the hair root ends here, a rounded area where the hair matrix is located
hair follicle
tunnel-like segment where strands or hair originate
hair matrix
located in the hair bulb; cells divide to produce new hair
hair papilla
contains the blood vessels to nourish the cells and nerve endings from the dermis; surrounded by the hair bulb
hair root
hair that is anchored by the follicle and lies below the surface of the skin
hair shaft
part of the hair that is not anchored to the follicle
medulla
the innermost layer of hair
telogen phase
the hair follicle is at rest and no new growth occurs
sebaceous glands
oil glands that release sebum, which is a mixture of lipids
