Question

How is long intestine designed to increase its absorption capacity?​

Answer 1

Microvilli are tiny, hair-like projections that increase nutrient absorption. This microvilli-covered surface makes the cell look fuzzy, and this is referred to as the brush border.

Answer 2

See first of all there is nothing called as LONG intestine it can either be large or small intestine....

For small intestine here is the answer:

In the small intestine, these cells contain microvilli, which are tiny hair-like projections that increase nutrient absorption. These projections increase the surface area of the small intestine allowing more area for nutrients to be absorbed.

(Microvilli are hairs that aid in absorption of nutrients)