表皮
alopecia
anagen
anatomical
anatomy
bald
beauty
body
bulb
capillary
care
catagen
cell
condition
cycle
dermatology
dermis
diagram
drawing
follicle
grow
growth
hair
health
human
illustration
layer
loss
medical
medicine
papilla
phase
problem
removal
root
scalp
science
scientific
shaft
skin
structure
telogen
thinning
treatment