digestivesystems消化系統(tǒng)-全文預覽
【正文】 d concentrates and inoculation with rumen bacteria from other ruminants begins fermentation in rumen which caused the rumen to develop. 粗飼料和精飼料消耗和接種瘤胃細菌開始在瘤胃中發(fā)酵，引起瘤胃發(fā)育。 ? Differences in size of some parts of the digestive system and location of fermentation within the digestive system dictate the types of feeds animals can utilize and the proper means of feeding. 由于消化系統(tǒng)尺寸大小不同或發(fā)酵位置不同決定動物能利用飼料的類型及適宜的飼喂方法。這是消化系統(tǒng)的工作。 25%=18% DIGESTION消化 Anatomy and Function of the Gastrointestinal Tract胃腸道解剖和功能 Key concepts about the digestive system and digestion ? Large plex molecules, like proteins, polysaccharides, and triglycerides must be broken down into their simplest part before they are absorbed into the blood or lymph. This is the job of the digestive system 大復雜分子如蛋白質、多糖和甘油三酯在吸收入血或淋巴之前必須分解成最簡單成分。 ? Fermentation improves overall utilization of feeds for all animals 發(fā)酵改善所有動物飼料充分利用。 Stomach ? Secretions of true stomach真胃分泌作用 ? HCl ? Denatures proteinbreaks intermolecular bonds ? Kills most bacteria present in foodstuffs ? Activates pepsinogen ? Ruptures starch granules破裂淀粉顆粒 ? Pepsinogen胃蛋白酶原 ? HCl converts pepsinogen to pepsin the active enzyme 胃蛋白酶原 胃蛋白酶 ? Pepsin begins digestion of proteins ? Clots milk 合牛奶牛凝結成塊 Regions of true stomach真胃的區(qū)域 ? Esophageal region食道 ? Nonglandular 無腺體 ? Area most prone to ulcers潰瘍 ? Cardiac region噴門 ? Produces mucus, which protects stomach lining產(chǎn)生黏液保護胃內層 ? Fundic region胃底 ? Produces mucus, enzyme, HCl ? Parietal cellsproduce HCl ? Chief cellsproduce pepsinogen ? Pyloric region幽門 賁門腺體區(qū)域 胃底腺體區(qū)域 憩室外部表面 幽門 食道腺體區(qū)域 胃切面邊緣 憩室外部表面 幽門腺體區(qū)域 Normal Esophogeal Area of Pig Stomach 豬胃正常的食道 Stomach Ulcer in a Human 人的胃潰瘍 Stomach ? Secretions of true stomach真胃分泌作用 ? Rennin (abomasum)凝乳酶 ? Clots milk ? Mucus黏液 ? Protects lining of stomach from acid and pepsin Ruminant Stomach 反芻動物的胃 網(wǎng)胃 瓣胃 食道 瘤胃 皺胃 小腸 瘤胃 皺胃 網(wǎng)胃 氣體 液體 瓣胃 Ruminant Stomach ? Rumen 瘤胃Development ? In newbor
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