Morphology
Form and structure.
5 Million
Average number of hairs on the human body.
Polymer
A molecule consisting of many identical repeating units.
Hair Follicle
Tube-like organ in the subcutaneous layer of skin that grows hair.
Cuticle
Outside covering of the hair shaft. It's made of overlapping scales.
Human
A fine, regular pattern of scales indicates that the sample is ___ hair.
Cortex
Middle layer of the hair shaft. It is made of keratin and embedded with pigment granules.
Cortical Fusi
Little sacs of air contained within the cortex.
Medulla
Inside layer of the hair shaft running down the center of the cortex.
Anagen Phase
Period of hair growth that lasts up to five years.
Catagen Phase
Intermediate stage of hair growth. Lasts about three weeks. Hair is not growing during this stage.
Telogen Phase
Final phase of hair growth, when the follicle is ready to push out the mature hair.
Metabolites
A specific product of a substance, formed by chemical processes in the body.
Growth Rate of Hair
1cm Per Month
Melanin
Pigment granules that give hair its color.