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AP CLC 244
Week Two Tuesday, Integumentary, Epidermis
| Question | Answer |
|---|---|
| Integumentary | Covering, Hair, skin, nails. Skin is 9-11 Lbs. |
| Three layers of skin | Epidermis, Dermis, Hypodermis |
| Epidermis facts | 5 layers, 4 cells. Cells of the Epidermis are protective. |
| 4 cells of the Epidermis | Keratinocytes, Melanocytes, Dandritc, Tactile, |
| 5 layers of the epidermis | Stratum Basale, Stratum Spinosum, Stratum Granulosum, Stratum Luciden, Stratum Corneum |
| Keratinocytes (cell) | Protein, Keratin producing cell, causes toughness |
| Melanocytes (cell) | Protein, Melanin producing cell, gives pigment. Melanin dots towards sun. Protects the nucleus of the Karatinocyte. *EVERYONE HAS THE SAME NUMBER OF MELANOCYTES. Dark skin is just more active. Further north you go the more vitamin D your skin wants. |
| Dandritic (cell) | White blood cell. Responsible for an immune response. It alerts. |
| Tactile (cell) | Sensory. Sends info about pressure or pain; is connected to the nerve. |
| Stratum Basale (1) (Layer) | Bottom most layer. Contains Melanocytes, Tactile, and Karatirocytes |
| Stratum Spinosum (2) (layer) | 2nd cell layers. 4-6 cells thick. Karatinocytes are living, Dendritic. Layer is darkening, taking on Melanin. |
| Stratum Granulosum (3)(layer) | 3rd layer Dying, 1-2 cells, release lipids. Gives moisture. |
| Stratum Luciden (4)(layer) | 4th layer. Only in thick parts of skin. Translucent. |
| Stratum Corneum (Layer) |
Created by:
kanderson96
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