PR. DUBOISTESSELIN, CNRI / SCIENCE PHOTO LIBRARY PR. DUBOISTESSELIN, CNRI / SCIENCE PHOTO LIBRARY
Palatine tonsil. Light micrograph of a section through the surface of a palatine tonsil. These tonsils are filters that keep the immune system in check. They are found at the back of the mouth and contain lymphoid follicles. The lymphoid follicles house the immune system's B cells (B lymphocytes) and antibodies. Bands of connective tissue (blue) known as trabeculae support the lymph node's interior.
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