top layer of skin, 1st out of 3, connective tissue portion of skin, 2nd out of 3, layer of skin that is mostly fat, 3rd and deepest layer, where hair originates, secretes oily substance that lubricates and waterproofs hair and skin, muscle that can contract and cause hair to stand up, secetes mostly water for thermoregulation, secretes water and proteins, stinky. In arm pits and groin. , source of nutrients and oxygen to cells, these cells are used as energy storage and organ protection, Feel sustained pressure, used for gripping, thermoreceptor for cold, detects temperature or vibration, sensitive to light touch, detects deep pressure, touch receptors, defining shapes and edges, can detect pain, pressure, temperature and itch, cell that make up the majority epidermis, cells that give us our skin tone and protect from UV rays, immune cells that help fight pathogens, Outermost layer of the epidermis, all cells flat and dead, present only in "thick" skin and can be called the clear layer, "grainy" layer due to the build up of keratin in keratinocytes, "spiny" layer, cells are alive in this layer and actively dividing.

Skin Notes Review Definitions

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