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Personal Care Review
The textbook definitions on personal care for skin, hair, teeth, eyes, and ears
| Term | Definition |
|---|---|
| Epidermis | The outer, thinner layer of the skin that is composed of living and dead cells |
| Dermis | The thicker layer of the skin beneath the epidermis that is made up of connective tissue and contains blood vessels and nerves |
| Melanin | A pigment that gives the skin, hair, and iris of the eyes their color |
| Sebaceous glands | Structures within the skin that produce an oily secretion called sebum |
| Sweat glands | Structures within the dermis that secrete perspiration through ducts to pores on the skin’s surface |
| Melanoma | The most serious form of skin cancer |
| Hair follicle | Structure that surrounds the root of a hair |
| Dandruff | Condition that can occur if the scalp becomes too dry and dead skin cells are shed as sticky, white flakes |
| Periodontium | The area immediately around the teeth |
| Pulp | The tissue that contains the blood vessels and nerves of a tooth |
| Plaque | Sticky, colorless film that acts on sugar to form acids that destroy tooth enamel and irritate gums |
| Periodontal disease | Inflammation of the periodontal structures |
| Tartar | Hard, crustlike substance formed when plaque hardens |
| Lacrimal gland | Gland that secretes tears into ducts that empty into the eye |
| Sclera | Tough, white part of the eye |
| Cornea | Transparent tissue that bends and focuses light before it enters the lens |
| Choroid | Thin structure that lines the inside of the sclera |
| Retina | Light-sensitive membrane on which images are cast by the cornea |
| External auditory canal | Passageway about one inch long that leads to the remaining portion of the outer ear, the eardrum. |
| Auditory ossicles | Three small bones linked together that connect the eardrum to the inner ear |
| Labyrinth | The inner ear |
| Tinnitus | Condition in which a ringing, buzzing, whistling, roaring, hissing, or other sound is heard in the ear in the absence of external sound |