chemical digestion - mixing food pieces with enzymes to break them down into molecules that cells can use, mechanical digestion - physically tearing or crushing food into smaller pieces, saliva - fluid produced by the salivary glands that contains amylase, enzymes - chemicals that cut complex molecules into smaller, simpler molecules, bolus - ball of chewed food and saliva, epiglottis - flap of tissue at the top of the esophagus that prevents food from entering the trachea, peristalsis - wave-like movement of muscles in the digestive system that pushes food along, chyme - thick liquid consisting of gastric juices and digested food, gastric juices - acidic liquid made of stomach acid and pepsin, pepsin - enzyme that breaks protein into amino acids, mouth - where digestion begins, salivary glands - accessory organs that produce saliva, esophagus - tube that connects the mouth to the stomach, stomach - muscular J-shaped organ that completes mechanical digestion,

Upper Digestive System Vocabulary

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