Animal Science Chapter 1
Domestication After animals become domesticated, they become dependent on man Most can’t survive in wild Most poultry can’t fly Sheep don’t shed wool Cows produce 20,000 lbs milk / year Birds produce 250 eggs / yr. (20 in wild)
Animal Use as Food Meat - (muscle tissue) Beef, Pork, Lamb, Goat, Poultry Milk - inexpensive source of protein cheese, ice cream, yogurt Eggs - pastries, mayonnaise, custards
Animal By-Products Bones - buttons, glue, mineral supplement for livestock feed (Calcium) Fat - chemicals, salves, creams, dressings, lubricants, soaps, food Glands - medicines, food additives Collagen - (connective tissue in joints) glue & gelatin Intestinal & Stomach tissue - lunch meats, surgical sutures, strings for musical & sports instruments
Animal Use as Work Cultivate land Transportation Control other animals Assist physically & medically handicapped Blind Epileptic & Diabetic
Other Animal Use Hides - leather Hair - wool, fiber Lab Animals - mice, rats, guinea pigs etc. Pets
What is the future of Animal Science? Embryo Transplant - can produce 20 calves from one cow per year Cloning - using an animal cell to grow an identical duplicate animal ??????