The tonsils consist of lymphoid tissue and are part of the immune system.
There are three sets of tonsils in the oral cavity.
- the lingual tonsils towards the back of the tongue
- the palatine tonsils which (if present) are often just visible at either side of the back of the mouth - see the red areas either side of the uvula on the diagram on the right
- the pharyngeal tonsil in the pharynx.
The tonsils are just one of the structures in the human oral cavity. See also the links to pages about other parts of the mouth.
The topics of digestion and teeth are included in some school e.g. GCSE and/or A-Level courses in subjects such as biology and human biology and in other courses that include human anatomy & physiology, diet, nutrition, and other health sciences.