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-taking up the products of digestion by cells lining the digestive system
-nutrients then move to the circulatory system
-secrete digestive juices through ducts
-salivary glands, liver, gallbladder, pancreas
-alternating waves of contraction and relaxation of smooth muscle
-moves through esophagus and intestines
-regulates movement through parts of the digestive system
-ring-like band of muscle
-esophagus, stomach, rectum
-protects soft lining of the mouth and lubricates food
-buffers= neutralizes food acids and prevents tooth decay
-antibacterial agents= kill bacteria
-amylase= digestive enzyme, starch
-muscular tube, food from pharynx to stomach
-muscles at top= voluntary
-muscles at bottom= involuntary
has many folds so it can stretch
can hold up to 2 liters of food/drink
produces pancreatic juice
-enzymes= breaks down complex sugars
-buffer= neutralize acid from stomach
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