Week 3: Hair Flashcards
The hair shaft is the portion of the hair that extends beyond the skin surface and is composed of _____, ______, and _______.
cuticle, cortex, and medulla
The combining forms pil/i, pil/o, and trich/o means?
hair
cuticle
is one thick, scaly layer of the hair shaft
cortex
main component of the hair shaft
several layer thick
responsible for coat color
medulla
the innermost component of the hair shaft
follicles
are sacs that hold the hair fibers
arrector pili
tiny muscle attached to the hair follicle
causes the hair to stand in response to cold or stress
piloerection
condition of the hair standing straight up
fur
short, fine, soft hair
pelt
skin in addition to fur or hair
guard hairs
long, straight, stiff hairs that form the outer coat
also called PRIMARY or TOPCOAT
secondary hairs
finer, softer, and wavy hair
also called the UNDERCOAT
tactile hair
long, brittle, extremely sensitive hairs
usually located on the face
vibrissae
long tactile hair
example: cat wiskers
cilia
thin, short hairs
example: eyelashes