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紫玉 發問時間: 社會與文化語言 · 1 0 年前

﹝急 15點 ﹞英文文章翻譯中文~關於腸胃~順暢易懂

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Ten small intestine, fills the central abdomen below the liver and stomach. The first 9¼inches(25 centimeters) in called the duodenum. Here the chyme is mixed with bile and pancreatic juices. Alkaline bile salts emulsify fat, increasing the surface area for enzyme action. Bile is stored in the gallbladder. Pancreatic secretions contain four enzymes: fat-splitting lipase; starch-breaking amylase and two that continue protein breakdown, but are activated only when they meet enterokinase, one of the six enzymes in the intestinal juice. Thus, carbohydrates are broken down into simple sugars such as glucose; proteins, into amino acids; and fats, into fatty acids and glycerol. All these are removed by the blood or lymphatic system. The intestinal wall provides a huge surface area for absorption, being folded and provided with villi, finger-like projections containing blood vessels and lacteals—lymphatic vessels originating in the villi.

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