tooth decay

Biological Terms

Ingestion
This is the taking in of food through the mouth and is then swallowed through the oesophagus.

Digestion
This is the breaking down of food after ingestion, digestion starts at the mouth where salivary glands release saliva which breaks down starch into sugars, the teeth and tongue also crush the food. The food travels down the oesophagus into the stomach, this muscular bag churns the food into a mush, the stomach c...