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body structure
integumentary system
| Term | Definition |
|---|---|
| epidermis layer | outermost layer of the epithelial tissue, covers the external surface of the body |
| skin | responsible for protection, temperature regulation, sensation, excretion, and vitamin D production |
| dermis layer | thick layer beneath the dermis that contains arteries, veins, nerves. "true skin" |
| subcutaneous layer | loose, connective tissue composed of adipose tissue and lipocytes |
| hair follicles | generates hair |
| sudoriferous (sweat) glands (secretion) | produce sweat to aid in cooling the body |
| sebaceous (oil) glands (secretion) | produce sebum to keep skin and hair soft and prevent bacteria from growing on the skin |
| fingernails and toenails | protect the end of the fingers and toes |
| skin | the largest organ of the body |
| protection | the skin is the body's first defense against illness and injury. it also protects the body's internal structures from dehydration and UV exposure |
| temperature regulation | the skin plays a significant role in the body's ability to maintain and regulate its temperature. |
| excreation | perspiring aids in cooling the body but also results in the loss of water and minerals |
| sensation (perspiration) | the skin is loaded with nerve receptors to detect sensations (cold, heat, pain) |
| vitamin D production | the body needs vitamin D to absorb calcium, which is needed for bone strengthen. vitamin D comes from sun exposure to the skin |
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