Top 102 Master Degrees in Medicine 2017. A student may choose to pursue a masterâs degree after receiving their bachelorâs degree. This postgraduate program typically takes about two to three years to complete.
The spleen and the thymus are also lymphoid organs of the immune system. The tonsils are lymphoid organs that are also associated with the digestive system. Lymphoid tissues contain lymphocytes, and also contain other types of cells for support.
Lymph nodes are part of the immune system. They release lymphocytes, a certain type of white blood cell that fights infection. The blood vessels and lymph vessels carry the lymphocytes to and from different areas in the body. Each lymphoid organ plays a role in the production and activation of lymphocytes. Organs in the lymph system include: Adenoids.