Itâs the usual cause of heart attacks, strokes, and peripheral vascular disease-- what together are called cardiovascular disease. How does atherosclerosis develop? Who gets it, and why? This deadly process is preventable and treatable. Causes
Organs of the Immune System. The major organs of the immune system are bone marrow, thymus, spleen and lymph nodes. These organs produce lymphocytes required to destroy bacteria, virus, tumor cells, etc.This article dwells on these major immune system organs that protect the human body from infections.-Cells: The main function of T-cells or T lymphocytes is intensifying immune system responses. They do this by secreting specialized factors, which in turn activate other white blood cells, to fight off infections. T-cells are again subdivided into different types.
The organs of the immune system are positioned throughout the body. They are called lymphoid organs because they are home to lymphocytes, small white bloodcells that are the key players in the immune system.here are two groups of immune system organs. 1  Primary (central)--organs where immature lymphocytes develop. 2  Thymus. 3  Bone marrow. 4  Secondary (peripheral)--tissues where antigen is localized so that it can be effectively exposed to mature lymphocytes. 5  Lymph nodes. 6  Appendix. 7  Peyer's Patches (of GI tract). 8  Tonsils. 9  Adenoids.