| A | B |
|---|
| epidermis | top or outer layer of skin |
| shaft | any part of the hair ABOVE the skin |
| arrector pili | muscle connected to hair follicle |
| sebaceous gland | produces sebum |
| follicle | pocket that holds the hair in the skin |
| bulb | bowl shaped to fit around follicle |
| papilla | location of blood vessels that nourish hair |
| cuticle | somewhat clear, opens and closes, outside layer of shaft |
| cortex | under cuticle, where melanin is, controls color |
| medulla | blondes are missing this; found in center |
| wavy hair's cross-section | oval shape |
| curly hair's cross-section | flat shape |
| straight hair's cross-section | round shape |
| gives hair its shape, size, and direction | follicle |
| where hair growth starts | papilla |
| anagen | 2-6 years |
| catagen | 2 weeks |
| telogen | 2-3 months |
| growth phase | anagen |
| transition phase | catagen |
| resting phase | telogen |
| sebum | oil which keeps the hair soft |
| porosity | ability of the hair to absorb moisture |
| melanin | the coloring matter |
