| A | B |
|---|
| dermis | skin layer beneath the epidermis; contains nerve cells, muscle fibers, sweat glands, oil glands, and hair follicles |
| epidermis | the outer superficial layer of skin made up of epithelial cells |
| hair follicle | narrow cavity in the dermis from which a hair grows |
| integument | an enveloping layer of an organism |
| keratin | protein contained in the skin’s outer epidermal cells that waterproofs and protects underlying cells and tissues |
| melanin | pigment in the inner layer of the epidermis that protects against harmful ultraviolet radiation and influences skin color |
| sebaceous gland | oil-producing gland in the dermis that lubricates skin and hair |
| first degree burn | cells in the epidermis are injured and may die |
| second degree burn | cells deeper in the epidermis die; cells in the dermis are injured and may die |
| third degree burn | cells in the epidermis and dermis die; nerve cells and muscle cells are injured |
