Section 4
Other Lymphoid Organs
Book
Version 29
By Boundless
By Boundless
Boundless Anatomy and Physiology
Physiology
by Boundless
3 concepts
![Thumbnail](../../../../../../figures.boundless-cdn.com/6649/square/illu-thymus.jpeg)
Thymus
The thymus is a specialized organ that "educates" T cells or T lymphocytes, which are part of the adaptive immune system.
![Thumbnail](../../../../../../figures.boundless-cdn.com/1952/square/250px-illu-spleen.jpeg)
Spleen
The spleen, similar to a large lymph node, acts primarily as a blood filter in the mononuclear phagocyte system of the immune system.
![Thumbnail](../../../../../../figures.boundless-cdn.com/3825/square/tonsils-diagram.jpeg)
Tonsils
The tonsils are one of the immune system's first lines of defense against ingested or inhaled foreign pathogens.