Explain how the structure of villi allows efficient absorption of the soluble products of protein digestion. Please help!!!?
- 5 年前最愛解答
Digestive system including the mouth, esophagus, stomach, large intestine, small
Intestine and anus and other organs, each organ should work together to Victoria
Support the normal operation of the digestive system. Intestinal shapes like water
Tube which circuitous coiled in the abdomen, about seven meters, food
Here continues to be digested and absorbed into small molecules, can be said to function
The most powerful of the digestive organs.
Visual observation of the small intestine wall section will feel very light
Slippery, but under a microscope, the interior of the small intestine show many recesses
Holes and protrusions. In fact, if the inner wall of the small intestine smooth without any
Projections, the absorption area of only 0.6 square meters, due to the number
One million projection, increased absorption area of 8.4 square meters. Small intestine
Hair-like projections refers to the inner wall of the small intestine mucosa, as well as small
One of the most important structural intestines, their job is to digest
Complete absorption of food, and then by the hair and internal microvascular milk
Mi tube to the various parts of the body go.
Strange is observed under an electron microscope, each
Epidermal cells on the villi in the small intestine lumen toward free
Surface, it will highlight the formation of roots about thousands of microvilli, its height,
They are quite consistent thickness, a distance like a brush in general. Microvilli
Although small, only a height of about 30nm, but their presence is large
Big increases the contact surface area of the small intestine and food, and through
The role of the cytoskeleton in the microvilli microvilli also in the small intestine
Gently rocking within the lumen, increasing the microvilli and food contact machine
Will, therefore food nutrients in the small intestine can be fully
Absorb, to supply our study, sports, the energy source of the work.