ANSC 2340 Lecture Notes - Shock Absorber, Collagen, Essential Amino Acid
10 Apr 2013
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One of the largest & most extensive organ systems in the body (covers the entire animal) Components: skin or hide, sweat and oil glands, hair (wool, fur, feathers), nails (hooves, claws, foot pads), and horns **these are all considered modifications of the surface epithelium. *protective against microbes, insects, external parasites, environmental, chemical, *animals housed outside during winter must have suited hide coat, hide thickness, and backfat thickness which can vary between breeds. *body temp regulation heat is transferred through blood to the skin to dissipate heat (cutaneous blood flow = blood flow to the skin), hair coat, and perspiration (sweating, but does not occur in all animals) *detects sensory info (touch & pressure) and relays info to cns. *excretes organic waste, excess salts & water (sweat) *synthesizes vitamin d (animals outside most of the year can synthesize enough vitamin d to not need any supplementation. *food gathering (claws needed for birds b/c they have wings instead of forlimbs)
