| Term | Definition |
| cutaneous membrane | skin |
| dermis | thick layer of the skin beneath the epidermis |
| epidermis | outer epithelial layer of skin |
| hair follicle | tubelike depression in the skin in which a hair develops |
| intergumentary | pertaining to the skin and its accessory organs |
| kertainization | the process by which cells form fibrils of keratin and harden |
| melanin | dark pigment normally found in skin and hair |
| mucous membrane | membrane that lines tubes and body cavities that open to the outside of body |
| sebaceous gland | skin gland that secretes sebum |
| serous membrane | membrane that lines a cavity without an opening to the outside of the bdoy |
| subcutaneous layer | beneath the skin |
| sweat gland | exocrine gland in skin that secretes a mixture of water, salt, urea, and other bodily wastes |
| synovial membrane | membrane that forms the inner lining of the capsule of a freely movable joint |
| sebum | oily secretion of sebaceous glands |
| keratin | protein in epidermis, hair, and nails |