| A | B |
|---|
| Study of the hair and its care | trichology |
| Depression that holds the hair root | follicle |
| Club shaped lower part of hair root | hair bulb |
| Makes up 90% of a hair's weight | cortex |
| Muscles that cause "goose bumps" | arrector pili |
| Where sebum (oil) is produced | sebaceous glands |
| Most of hair is made of this element | carbon |
| Bonds that join amino acids | peptide bonds |
| Bonds that account for hair strength and elasticity | side bonds |
| Strongest bonds of the cortex | disulfide bonds |
