The finger like projections of the small intestines are called?

The finger like projections of the small intestines are called villi.

Explanation:

The structure of villi is just like human finger. Villi increases the surface area of small intestine which increases the absorption. Villi is a part of small intestine which is responsible for the absorption of nutrients that are present in the food particles. These nutrients are again combined with the blood and used by the body. Villi do not helps in the digestion of food substances, they can only absorb.

not only is it colder, it also becomes darker, less salty, and more dense.