Question

explain three parts of breakdown in living organisms

Answer 1

Three parts of breakdown are as follows:
In the mouth--The food is broken down in small pieces.Also it get softens so swallowing is easier.
In the Stomach--The food's nutrients gets broken by the action of certain enzymes produced by stomach itself n also by pancrase.
In the Intestine(both)--Food gets broken down n a juice is formed which then directly goes to the blood vessels,intestines are richly supplied by blood vessels,though the undigested food gets excreted out through anus.