食物的吸收 Absorption 夏强,PhD 浙江大学医学院生理学系 医学院科研楼C座518室 电话:88206417,88208252 Email:xiaqiang@zju.edu.cn
食物的吸收 Absorption 夏 强，PhD 浙江大学医学院生理学系 医学院科研楼C座518室 电话：88206417, 88208252 Email：xiaqiang@zju.edu.cn
学习目标 了解人体消化系统与吸收有关的结构 能比较消化道对各类营养物质的吸收形式 和机制 能应用消化道吸收知识明确促进与抑制 种菅养物质吸收的作用靶点
学习目标 • 了解人体消化系统与吸收有关的结构 • 能比较消化道对各类营养物质的吸收形式 和机制 • 能应用消化道吸收知识明确促进与抑制一 种营养物质吸收的作用靶点
Copyright@ The McGraw-Hill Companies, Inc. Permission required for reproduction or display Blood flo Hepatic ++++ portal vein Absorption Secretion Mouth Food and water 鸟知:mn9 Feces Esophagus Rectum Small intestine Stomach Colon Motility 消化道四大过程 digestion, secretion, absorption and motility
消化道四大过程: digestion, secretion, absorption, and motility
Food 2.0 L/day Saliva 1.5 L/day 1.5 L/day 消化道的液体平衡 Digestive secretions are mostly water 1 L/day Presented to lumen HCOS) with the average of small intestine 8.5 L/day amounts indicated here. Note that only Proximal Presented to colon: 100 ml are excreted by colon in feces. so the by colon 1.9 L/day mechanisms for water absorption are efficient (recall the kidneys primary role in water and Excreted osmotic homeostasis
消化道的液体平衡 Digestive secretions are mostly water, with the average amounts indicated here. Note that only 100 ml are excreted in feces, so the mechanisms for water absorption are efficient (recall the kidneys’ primary role in water and osmotic homeostasis)
Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display Lumen of gastrointestinal tract Endocrine cells Mucous cells Epithelium Exocrine cells Lamina Mucosa Muscularis major blood and Submucosa lymphatic vessels Submucosal nerve plexus Muscularis muscle externa Myenteric Longitudinal Ducts from external exocrine Abdominal cavity glands(liver, pancreas 消化道与吸收有关的结构 The gut wall has a layered organization, with the absorptive cells lining the lumen and neural and muscular components below. blood and lymph vasculature is abundant to transport absorbed nutrients
消化道与吸收有关的结构 The gut wall has a layered organization, with the absorptive cells lining the lumen and neural and muscular components below. Blood and lymph vasculature is abundant to transport absorbed nutrients