Anatomy and Cell Biology 3319 Lecture Notes - Lecture 3: Stratified Squamous Epithelium, Glycolipid, Tyrosine
12 Apr 2016
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Suggest reading: pawlina 6th and 7th ed. p. 488 - 502. Identify the layers of the epidermis and relate their structure to function. 4: describe the function of melanocytes and langerhans" cells. Identify the epidermal ridges, dermal papillae, and interpapillary pegs. 6: differentiate between the papillary and reticular layers of the dermis. Barrier against physical, chemical, and biological agents in external environment. Immunologic function via langerhans" cells: prevention of water loss. Acylglucosylcermide in the stratum corneum is a water proofer: peripheral nervous system receptors, vitamin d production, heat regulation. Heating us up: constricting blood flood to skin allows more blood to go to other organs. Cooling us down: sweat evaporates and takes away heat: secretion of waste through eccrine sweat glands, apocrine sweat glands, and sebaceous glands. Mostly dense irregular connective tissue (reticular layer); some loose ct (papillary layer) near the epidermis: subdermis/hypodermis. Loose connective tissue with a lot of adipocytes.
