How are the villi of the small intestine important to the digestive system?

It's main job is to absorb the nutrients of food, deliver it to the bloodstream, and pass it to the large intestine. The large intestine then in turn passes it to the rectum and anus.

The small intestine has little villi on the bottom which take all of the nutrients from the food.

because i dont know

The vili absorb the needed nutrients for the body to function and contain the right amount of energy.

Well, the small intestine actually does a lot of the digesting. Inside of the small intestine are small, finger-like villi that absorbs nutrients. Without it, your digestive system can not function...