| A | B |
|---|
| integument | covering |
| epidermis | outermost layer of skin |
| dermis | lower layer of skin that contains connective tissue, blood and lymph vessels, and nerve fibers |
| subcutaneous | layer below the skin that connects to the underlying muscles |
| keratin | protein found in the upper cells of the epidermis, hair and nails |
| melanocytes | cells that produce pigment for the skin and hair |
| melanin | black-brown pigment that gives colour to the skin and hair |
| sebaceous gland | gland that secretes sebum into a hair follicle |
| sebum | oily substance that lubricates skin and discourages bacterial growth |
| sudoriferous gland | sweat gland; produces and secretes perspiration |
| perspiration | sweat; composed of water, salt, and waste products |
| hidrosis | production of sweat |
| eccrine sweat glands | open onto skin surface through pores; most numerous type of sweat glands |
| apocrine sweat glands | sweat glands that open onto hair follicles and respond to pain, emotional stress and sexual arousal |
| hair | columns made of a meshwork of cells filled with hard keratin |
| follicle | sac that holds the root of the hair |
| nail | plate of keratinized cells that protects the end of a finger or toe |
| nail matrix | region of cell division at the base of a nail |
| paronychium | soft tissue surrounding the nail border |
| lunula | whitish region at the base of the nail plate |
| cuticle | narrow band of epidermis that is attached to the surface of the nail just in front of the root |
| dermatologist | medical doctor who specializes in diagnosing and treating disorders of the skin, hair, and nails |
| basal layer | layer of epidermis that produces epithelial cells and contains melanocytes |
| skin | largest organ; provides a barrier against infection and water loss, contains receptors for touch, regulates body temperature |
