| A | B |
|---|
| epidermis | the outer layer of the skin |
| dermis | the middle layer of the skin |
| hypodermis or subcutaneous layer | the lowest layer of the skin |
| melanin | a pigment that protects us from ultraviolet rays of the sun |
| sebaceous glands | produce oil |
| sweat glands | produce sweat to cool the body |
| hair follicles and oil glands | derived from the epidermis but located in the dermis |
| arrector muscles | muscles attached to hair follicles |
| blood vessels | nourish the skin and help regulate temperature |
| adipose tissue | fat cells found in the subcutaneous layer of the skin |
| skin | the largest organ of the body |
