digestion - the process by which the body breaks down food into small nutrient molecules, absorption - the process by which nutrient molecules pass through the wall of the digestive system into the blood, saliva - the enzyme in the mouth that changes STARCH to SUGAR, enzyme - chemical that breaks down food into smaller molecules, epiglottis - a flap of tissue that seals off the windpipe and prevents food from entering the windpipe, esophagus - a muscular tube that connects the mouth, and throat (pharynx) to the stomach, mucus - a thick, slippery substance produced by the body, peristalsis - involuntary waves of muscle contraction that keep food moving along in one direction through the digestive system, stomach - a J-shaped,muscular pouch located in the abdomen, small intestine - the part of the digestive system in which most chemical digestion takes place, liver - the largest organ in the body --it produces BILE, bile - a substance produced by the liver that breaks up fat particles, gallbladder - the organ that stores bile after it is produced by the liver, pancreas - produces enzymes that breakdown food into smaller molecules and regulates the level of sugar in the blood, villi - the finger-shaped structures that cover the inner surface of the small intestine---helps nutrients get absorbed into the blood, large intestine - the last section of the digestive system where water is absorbed into the bloodstream and the remaining mater is eliminated from the body, rectum - the end of the large intestine where waste material is compressed into a solid form before being eliminated, anus - a muscular opening at the end of the rectum through which waste material is eliminated from the body, calorie - the amount of potential energy in food, nutrients - substances in food that your body needs to grow, to repair itself, and to supply you with energy, bolus - ball of food formed in the mouth then gets swallowed, chyme - softer food and water that leaves the stomach, mechanical digestion - physical breakdown of large pieces of food into smaller pieces, chemical digestion - enzymes break down food into smaller molecules, pepsin - enzyme that breaks down proteins in the stomach,

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