Did u still remember the text 《豆瓣的旅程》we have learned in the prime school?
In medical ,it belongs to the Digestive system.
Digestion
begins in the Mouth with chewing,
salivation, the secretion of saliva, moinstens the food ,唾液润湿食物
provides the amylase for the initial digestion of starch提供初步消化淀粉的淀粉酶
↓
swallowed and passes through the pharynx or throat, and into食物被吞下并经过咽喉进入食管
esophagus
↓ cardiacardiato privents the regurgitation贲门 防止食物回流——反胃
stomach a great deal of moinstening and mixing occurs within the stomach 胃主要是大量的进行湿润和混合所要消化的食物
gastric juicethat contains enzyms---biological catalysts that act on protein
胃液中含有叫生物催化剂的一种酶，它作用于蛋白质
↓pylorus 幽门--pyloric sphinctter 幽门阔约肌---------food here we called chyme (食糜)
the small intestine
↓duodenumwhere the greatest amount of digestion occurs小肠的第一部分是十二指肠，
在这里将进行绝大部分的消化
here digestive substances from from other organs enter by means of ducts肠液中的助消化物质是通过导管从其他器官进入其中
1.pancreas→ the pancreatic juice enters through the pancreatic duct胰腺分泌的胰液从胰管进入小肠
secretes enzymes to digest protein, lipid, and carbohydrate胰液分泌一种酶可以消化蛋白质，脂类，和碳水化合物
secretes an alkaline solution for the neutralization of acid carried into S-T from stomach
胰液同时还分泌一种碱性溶液用来中和从胃流入小肠的胃液
2.Bile,
secretes bt Liver and stalled in Gallbladder, enters the D through the common bile duct
胆汁是由肝分泌，且储存于胆囊中，它通过胆总管进入十二指肠
bile, an emulsifierlikes the action of soap that allows the mixing the fat and water
胆汁不是酶而是一种乳化剂，有点像肥皂的用途，它使脂质和水结合
↓
digestion is complete:
1. nutrients -----absorbed into blood capollaries and lymph vessels in the intestine wall.
当消化完成后，营养物质就从小肠壁的毛细血管和淋巴管被吸收。
2.material not digested passes into
thelarge intestine（or colon ）water and minerals are absorbed at here
而没有被吸收的剩下的残渣在肠的蠕动下进入大肠(结肠),大肠将从中吸收水分和矿物质
↓the first part of the colon is cecum, a blind sac结肠的第一部分是个盲囊，称为：盲肠
whicn attached it is the appendix, a nonfunctional structure.依附在盲肠上的是没有任何功能的阑尾
↓↓↓↓↓↓↓
the remaining matter is excreted as feces 剩余的物质被作为粪便排出体外
呵呵豆瓣的旅行，在最后出来时还是那半豆瓣吗？
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