What are 3 structures involved in ingestion?

The three structures involved in ingestion are:

1. The mouth: The mouth is the first part of the digestive system and is responsible for ingesting food. It contains the teeth, which break down food into smaller pieces, and the tongue, which helps to move food around the mouth and mix it with saliva.

2. The pharynx: The pharynx is the second part of the digestive system and is responsible for moving food from the mouth to the esophagus. It is also known as the throat and contains the tonsils, which help to trap bacteria and viruses from entering the body.

3. The esophagus: The esophagus is the third part of the digestive system and is responsible for moving food from the pharynx to the stomach. It is a muscular tube that contracts to push food down towards the stomach.