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.
1 Most of the organs of the immune system are concerned with the growth, development, and deployment of lymphocytes. 2  These organs are called lymphoid organs. 3  Lymphocytes travel through the blood searching for foreign cells. 4  B cells use antibodies to target bacteria. 5  T cells actually do the fighting.