Question

Why does absorption of digested food occur mainly in the small intestine?

Answer 1

The small intestine is where most of the digestion of food takes place. The small intestine, which has numerous structural modifications for this function, is where maximum nutrient absorption takes place. They are as follows:

1. It is a 6-meter-long, narrow tube. For optimal nutritional absorption, its size is advantageous.
2. The small intestine's inner surface develops projections called villi that resemble fingers. For optimal absorption, the villi increase the small intestine's surface.
3. Each villus has lymph and blood capillaries that transport absorbed nutrients to every cell in the body.