Any filter that could strain out microscopic
material would not allow the passage of any food particles and would make eating
impossible. Tonsils and adenoids are strategically located near the entrance to
the breathing passages where they catch incoming infections. They "sample"
bacteria and viruses and can become infected themselves. It is thought that they
then help form antibodies to those "germs" as a part of the body's immune system
to resist and fight future infections.
