| A | B |
|---|
| Equilibrium | When factors remain in balance |
| Homeostasis | Keeping conditions constant within an organism |
| Integumentary system | Skin, hair and nails that protect the body |
| Dermis | The middle, living layer of skin |
| Epidermis | Top layer of skin |
| Pore | An indentation or opening in the skin that lets out fluids |
| Follicle | Deep indentation in skin from which a hair grows |
| Melanin | Pigment that gives skin color |
| Perspiration | A salty fluid that cools the skin |
| Sebum | Oily substance secreted from the skin |
| Sebaceous gland | Skin gland that produces oil |
| Sweat gland | Skin gland that produces perspiration |
