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A&P1-3 Integumentary
Ch 3: Integumentary System
| Term | Definition |
|---|---|
| Acne | Inflamed or infected sebaceous glands in the skin |
| Contact inhibition | the end of keratinocyte lateral growth because edges of stratum basale cells are in contact with each other |
| Cornification | Process in which keratinocytes fill with keratin and die as they move toward the surface of the epidermis |
| Cutaneous | Pertaining to the skin |
| Epidermis | Superficial layer of the skin that is subdivided into 4 or 5 general layers called strata |
| Exocrine glands | Glands that produce and secret products that are delivered to the appropriate locations through ducts |
| Fibrosis | Wound healed with scar tissue; normal function is not returned |
| First-degree burn | A burn that involves only the epidermis and whose symptoms include redness, pain, and swelling; the most common type of burn |
| Keratin | A hard, waterproof protein |
| Mediators of inflammation | Chemicals produced by damaged tissues and diffuse away from the damaged area causing any blood vessels they meet to dilate |
| Melanocytes | Cells found in the stratum basale that produce skin pigments called melanin |
| Papillae | bumps on the superficial edge of the dermis in direct contact with the epidermis (found on palmar & plantar surfaces & tongue) |
| Pathogens | Disease-causing foreign invaders |
| Regeneration | Wound healing with the same tissue that was damaged; normal function is returned |
| Sebum | A very oily, lipid-rich substance produced by the sebaceous gland to moisturize the skin and hair |
| Stratum basale | The deepest layer of the epidermis and the only one with cells that actively grow and divide to produce new epidermis |
| Subcutaneous layer | Layer of skin, technically not part of the skin, deep to the dermis and attaches skin to the rest of the body |
| Sweat glands | 4 types of exocrine glands that are located in the dermis (merocrine, apocrine, ceruminous, mammary) |
| Thin skin | Epidermis that contains hair follicles and lacks stratum lucidum. |
| Wound contracture | Scab formation that pulls the edges of the wound closer together as it dries. |
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