The main difference between ingestion and digestion is that ingestion is the taking of food into the body whereas digestion is the breakdown of food into small molecules that can be absorbed by the body. ... In mechanical digestion, large food particles are broken down into small food particles.

What comes first digestion or ingestion?

The first activity of the digestive system is to take in food through the mouth. This process, called ingestion, has to take place before anything else can happen.

What is the meaning of ingestion and digestion?

Definition. Ingestion: Ingestion refers to the process of taking food or another substance into the body by swallowing or absorbing it. Digestion: Digestion refers to a process by which food is broken down into simple chemical compounds that can be absorbed and used as nutrients or eliminated by the body.