Main function of mitochondria in animal cell

It is the powerhouse of the cell. It breaks down nutrients and creates energy for the cell.

act like a digestive system which takes in nutrients and breaks them down

Explanation:

Mitochondria are known as the powerhouses of the cell. They are organelles that act like a digestive system which takes in nutrients, breaks them down, and creates energy rich molecules for the cell. The biochemical processes of the cell are known as cellular respiration.