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anatomy 3.2
| Question | Answer |
|---|---|
| integumentary system | an entire system that includes a cutaneous membrane, sweat and oil glands and hair and nails |
| keratin | a tough protein found in nails & hair that adds strength |
| melanocytes/melanin | a pigment that protects the body from sun ray damage |
| epidermis/dermis | thick over areas (sole in feet) thin in other areas (eyelids) |
| epidermis 5 layers of tissue | stratum corneum, stratum lucidum, stratum granolusm, stratrum spinosum, stratum basale |
| keratinocytes | produces keratin |
| epidermal dendritic cells | they respond to the presence of foreign bacteria/viruses by starting a immune system response |
| Merkel cells | ( in the stratum basale) are tough receptors |
| papillary layer | outer layer of the dermis, |
| reticular layer | part of the dermis ( includes blood , sweat and oil glands, involuntary muscles, hair follicles, nerve endings) |
| sudoriferous glands | dermis over entire body, larger concentration over the axilla |
| Sebaceous glands | located everywhere on the body (except hands and soles of feet), makes oily substance (sebum) |
| sebum | helps to keep skin and hair soft and also kills bacteria |
| hypodermis | (beneath the dermis) serves as storage repository for fat. |