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anatomy
| Dermis | layer of skin between the epidermis and hypodermis, includes nerve endings, glands, and hair follicles |
| epidermal dentritic 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 bemeath 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 gland, 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 grandulosum | a layer of somewhat flattened cells laying 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 grandulosum |
| sudoriferous glands | sweat glands that are distributed in the dermis over the entire body |