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A&P Vicab
Lesson 3.2
| Term | Definition |
|---|---|
| Dermis | layer of skin between the epidermis and hypodermis; includes nerve endings, glands, and hair follicles |
| Epidermal Dendritic Cells | skin cells that initiate an immune system response to the presence of foreign bacteria or viruses |
| Epidermis | the outer layer of skin |
| Hypodermis | the layer of skin beneath the dermis, which serves as a storage repository for fat |
| Integumentary System | enveloping organ of the body that includes the epidermis, dermis, sudoriferous and sebaceous glands, and nails and hair |
| Keratin | a tough protein found in the skin, hair, and nails |
| Keratinocytes | cells within the epidermis that produce keratin |
| Melanin | a pigment that protects the body against the harmful effects of ultraviolet ray damage from the sun |
| Melanocytes | specialized cells in the skin that produce melanin |
| Merkel Cells | touch receptors in the skin |
| Papillary Layer | the outer layer of the dermis |
| Reticular Layer | the layer of skin superficial to the papillary layer |
| Sebaceous Glands | glands located all over the body that produce sebum |
| Sebum | an oily substance that helps to keep the skin and hair soft |
| Stratum Basale | the deepest layer of the epidermis |
| Stratum Corneum | the outer layer of the epidermis |
| Stratum Granulosum | a layer of somewhat flattened cells lying just superficial to the stratum spinosum and inferior to the stratum lucidum |
| Stratum Lucidum | the clear layer of thick skin found only on the palms of the hands, fingers, soles of the feet, and toes |
| Stratum Spinosum | the layer of cells in the epidermis superior to the stratum basale and inferior to the stratum granulosum |
| Sudoriferous Glands | sweat glands that are distributed in the dermis over the entire body |