DERMATOLOGY_BOARD PREP WITH 100% CORRECT ANSWERS

What are the skin layers Epidermis Dermis Sub Q layer Epidermis Is the most superficial layer of the skin and is avascular. The epidermis doesn't contain any nerves or sensory receptors. Brainpower Read More 0:03 / 0:15 Stratum Basale This is the deepest layer of the epidermis and the most nourished. It's a place of constant cell division. Contains melanocytes which absorb UV rays as a protective response and give the skin color. Stratum cornium This is the most superficial layer of the epidermis Dermis Deep to the epidermis and is formed of dense connective tissue. This layer contains cells like fibroblasts that make collagen and elastin. The dermis is vascularized and nourishes the epidermis and plays a role in thermoregulation. It also contains nerves and sensory receptors as well as lymph vessels and houses the skin appendages. What structures are found in the dermis? Hair follicles Nails Ecrine glands Apocrine glands Sebaceous glands Hair Is found all over the body and acts to protect certain areas of the body and mildly helps insulate. Hair is composed of dead keratinized cells and grows from the root into the hair follicle and into the dermis. The color is based on melanin. Nails Are hard keratin plates from cells that divide in a cell matrix (growth zone) at the base of the nail. Nails grow about 1mm per week and regrow every 3-5 months. Toenails take 12-18 months to be replaced. Composed of the Lunula, Cuticle, and Paronychium Ecrine Sweat Glands Are the most common type of sweat gland. Perspiration is controlled by the sympathetic nervous system. Sweat contains water, salts, vitamin C, metabolic waste, lactic acid. It empties into the pores and is colorless and odorless. Apocrine Sweat