Lymph nodes are small bean shaped structures lying along the course of the
Lymph nodes have two main functions:
As phagocytic cells, which act as filters for particulate matter
Presentation of antigens to the immune system.
The tonsils are located at the back of the mouth and adenoids at the back of the nasal cavity. Both consist of
lymph tissue and help to fight off infection. They are at their largest during childhood and gradually shrink with age.
These are quite large aggregates of lymphoid tissue found in the small intestine, part of the lymphatic system
which help to fight infection.