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Notes #7
Integumentary System
| Term | Definition |
|---|---|
| Epidermis | the very top layer of the skin |
| dermis | the middle layer of the skin containing fibroblasts |
| hypodermis | the bottom layer of the skin, contains veins/arteries/fat |
| 1st degree burn | only affects the epidermis and causes redness with a little pain |
| 2nd degree burn | affects the epidermis and dermis, causes severe pain and leaves blisters |
| 3rd degree burn | affects the epidermis, dermis, and hypodermis. Is not painful because the nerves are burned off causes no feeling. Sever blistering remains with waxy skin |
| keratinocyte | 90% of the cells in the skin, hair, and nails. Helps make the skin waterproof and elastic. It is found in the hypodermis |
| Melanocyte | Produces melanosomes that contain the protein melatonin that protect the keratinocytes from UV damage to the their nucleus. found in the hypodermis |
| fibroblasts | found in the dermis, provide structural support that prevents wrinkles |
| epi- | prefix that means above |
| sebac- | prefix that means sebum (oil or wax) |
| dermis- | prefix that means skin |
| hypo- | prefix that means below or under |
| lipo- | prefix that means fat |
| cyte- | prefix that means cells |