Lower bulb-shaped part of the hair.
is the outer covering of the hair shaft.
each hair goes through a continuous cycle that has phases of varying duration (anagen phase, catagen phase, telogen phase)
term referring to the number of follicular units per square centimetre
the hair follicle is a hollow segment of the epidermis that extends downwards to the dermis. The follicle is a thin bag made of epidermal tissue that’s bulb-shaped at its lower part. Hair follicles produce hairs. Each follicle is fed by a papilla.(The papilla of a hair follicle is an indentation at the base of the bulb of the hair. It contains many blood vessels that supply nutrients to nourish the growing hair.)
|Hair growth cycles||
there are 20 to 30 cycles during a lifespan. Each cycle will last 3 to 5 years on average.
|Hair mass index||
unit of measure for hair density incorporating the number of hairs per square centimetre as well as the hairs’ diameter.
a condition inherited from the parents or ancestors.