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RIZZO A&P 6
Chapter 6 The Integumentary System
| Question | Answer |
|---|---|
| Corium | true skin; another name for the dermis |
| Cuticle | outermost portion of the hair |
| Dermis | second layer of skin; also called the corium |
| Epidermis | top layer of skin |
| Hair | one of the main characteristics of mammals |
| Hair follicle | an epidermal tube surrounding an individual hair |
| Hypodermis | subcutaneous tissue |
| Keratin | a protein material |
| Keratinization | a process by which epidermal cells change shape, compostion and lose water as they move to the upper layers and become mainly protein and die |
| Lunula | the white crescent at the proximal end of each nail |
| Melanocytes | cells responsible for producing melanin |
| Melanin | pigment responsible for variation in skin color |
| Nail bed | area from which the nail grows |
| Nail body | visible part of the nail |
| Nail root | the part of the nail body attached to the nail bed |
| Root | the lowermost portion of a hair found in the hair follicle |
| Sebaceous glands | glands that secrete sebum |
| Sebum | oily substance that lubricates the skin’s surface |
| Shaft | visible portion of the hair |
| Stratum corneum | outermost layer of epidermis, consisting of dead cells |
| Stratum germinativum | regenerative layer of epidermis, lowermost layer |
| Sweat glands | simple tubular glands fund in most parts of the body that secrete sweat |