| A | B |
|---|
| Dermis | The thicker layer of the skin beneath the epidermis that is made up of connective tissue and contains blood vessels and nerves |
| Dandruff | A condition that can occur if the scalp becomes too dry and dead skin cells are shed as sticky, white flakes |
| Melanin | A pigment that gives the skin, hair, and iris of the eyes their color |
| Sweat Glands | Structures within the dermis that secrete perspiration through ducts to pores on the skins surface |
| Epidermis | The outer, thinner layer of the skin that is composed of living and dead cells |
| Hair Follicle | A structure that surrounds the root of a hair |
| Seaceous Glands | Structures within the skin that produce an oily secretion called sebum |
| Melanoma | The most serious form of the skin cancer |
| Pulp | The tissure that contains the blood vessels and nerves of a tooth |
| Plaque | A sticky, colorless film that acts on sugar to form acids that destroy tooth enamel and irritate gums |
| Chroid | A thin structure that lines the inside of the sclera |
| Lacrimal Glands | The gland that secretes tears into ducts that empty into the eye |
| Tartar | Teh hard, crustlike substances formed when plaque hardens |
| Periodontal Disease | An inflammation of the periodontal structures |
| Sclera | The white part of the eye |
| Cornea | A transparent tissure that bends and focuses light before it enters the lens |
| Retina | The light-sensitive membranes on which images are cast by the cornea |
| Auditory Ossicles | Three small bones linked together that connect the eardrum to the inner ear |
| External Auditory Canal | A passageway about one inch long that leads to the remaining portion of the outer ear, the eardrum |
| Labyrinth | The inner ear |
| Tinnitus | A condition in which a ringing, bussing, whistling, roaring, hissing, or other sound thatis heard in the ear in the absence of ecternal sound |
