题目内容
Between the ileum of the small intestine and the cecum is a sphincter, the_____, that prevents food from traveling backward into the small intestine.
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The ______ is a muscular tube about 25 cm (10 inches) long. In the_____, food is lubricated with mucus and moved by ______(a rhythmic contration)into the stomach.
Between the distal, or far, end of the stomach and the small intestine is the___. The region of the stomach leading into this ___, the___, is important in regulating how rapidly food moves into the small intestine.
After bile divides fats into tiny particles, the highly active pancreatic enzyme _______digests almost all of them. In this process, fats are usually broken down into two simpler compounds, glycerol (glycerin) and fatty acids, which are more readily absorbable. _______, this enzyme changes starch to sugar. _______, a pancreas secreted enzyme, splits proteins into amino acids, which are small enough to be absorbed through the intestine.
The _____colon passes horizontally to the left. The _____colon, is at the distal end of the ______ colon and leads into the rectum. The ______ colon, extending from the cecum to the upper abdominal area.
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