There are numerous lymph nodes throughout the lymphatic system; these act as filters. They retain any infiltrated bacteria. Lymph nodes, which have a round or bean-shaped appearance, not only filter the lymph but they also form the lymphocytes. Lymph nodes are found in the neck, groin and hollow of the knee. Various organs, which have an anatomical and functional link with the system, are integrated into the lymphatic system.

They are divided into primary and secondary lymphatic organs, depending on their function. The primary organs include most importantly, the thymus and the bone marrow, because they are responsible for the formation, development and maturing process of the immune cells. The secondary organs refer to those organs into which the immune cells migrate. Together with the lymph nodes and lymphatic

The spleen can be moved, and can go forwards and deeper when the body is lying on the left or right.

The T-lymphocytes, which make up 75% of the blood lymphocytes, are formed in the thymus. The T-lymphocytes are the carriers of the cellular immune system, example, the body's defense against mutated cells (tumors) exogenous cells (transplants) and virus and mycosis infections.

The blood transports the T-lymphocytes to the secondary lymphatic organs (spleen, tonsils, lymph nodes), where they perform their tasks in the immune system. Most of the T-lymphocytes (90%) produced in the thymus are decomposed again in the cortex of the thymus, for reasons that are not known.

Some topics in this essay:
, System Lymphatic, lymph nodes, lymphatic system, lymphatic tissue, Cardiovascular System, lymphatic vessels, immune system, mucous membranes, system lymphatic, tissue mucous, immune cells, secondary lymphatic organs, lymph node, lymphatic tissue mucous, tissue mucous membranes, system lymphatic system, nodes receive lymph,