Question

what is micro villi and what does it's function?

Answer 1

Micro villi is present in the apical surfaces of some epithelial cells.
In the small intestine it increases nutrient absorption.
In the cell it increases the surface area 

Answer 2

Micro villi presents in the small intestine which increases the surface area of small intestine by which it is able to easily absorb food materials like peptides , lipids , etc.  and send this to the blood and lymph  .