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Skin Accessories
Membranes, Skin Layers, Accessories, & Derivatives
| Question | Answer |
|---|---|
| apocrine glands | sweat glands that connect to the hair follicle (in conjunction with bacteria, they're responsible for body odor). Found in the axillary & genital areas. Apocrine sweat also contains sebum, urea, & proteins ***apocrine sounds like APE = hairy & stinky*** |
| dermal papillae | bumps just under the epidermis, in the papillary region, that give your skin fingerprints |
| dermis | the "middle" layer of skin, deep of the epidermis; can be further divided into the papillary and reticular regions |
| eccrine gland | type of sweat gland (also known as merocrine) whose ducts connect directly to the epidermis. Found all over the body; used to produce a watery mixture that moves heat from inside your body to the skin's surface |
| epidermis | the outermost layer of skin |
| free nerve ending | a cutaneous receptor in the papillary region that detects pain |
| hypodermis | the deep, insulative layer of your skin made of adipose; over time, this subcutaneous fat wears down, causing the skin to sag, resulting in lines & wrinkles |
| keratin | a tough protein created in the stratum granulosum that hardens the skin. It prevents the skin from soaking up too much moisture and gives hair & nails a hard texture. |
| lamellar corpuscle | a receptor in the reticular region that detects heavy pressure, also called Pacinian's corpuscle |
| melanin | a dye produced by skin cells called melanocytes that helps to block ultraviolet light--a natural sun screen; also determines shade of skin, hair, eye color |
| papillary region | the superficial region of the dermis; contains dermal papillae, tactile corpuscles, sebaceous glands, & free nerve endings |
| reticular region | the deep region of the dermis; contains blood vessels & lamellated corpuscles |
| sebaceous glands | oil glands connected to hair follicles that keep the skin and hair cells soft and flexible by producing a moisturizing lipid called sebum |
| sebum | the moisturizing oil produced by sebaceous glands; keeps skin & hair soft, also kills bacteria |
| tactile corpuscle | a receptor in the papillary region that detects light touch, also called Meissner's corpuscle |
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