This is a free preview. For full access
Nutrition and Digestion
Small and Large Intestine Functions
Description
The small and large intestines complete digestion and absorb nutrients, water, and electrolytes. They are two structurally distinct organs with different shapes and jobs. Together, they move food material from the stomach toward elimination.
The small intestine is about 7 meters long and has an i...
Show More
Transcript
小肠和大肠负责
吸收营养和水
虽然小肠相当狭窄
但这个器官大约22英尺长
并且压缩到腹腔中
消化物首先到达十二指肠
然后前往中间和最长的部分 即空肠
在这里 内衬包含粘膜褶皱
覆盖有指状绒毛
上皮细胞的上覆层具有
称为微绒毛的细胞质延伸
这三种结构增加了
小肠的表面积
以确保最佳营养效果
在小肠的末端是回肠
它通过回盲瓣
连接到大肠
在大肠的第一部分 ...
Show More
More videos by Standards
Show More