Lymph nodes in the body are located approximately from the head to the knees. It creates a one-directional flow of lymph towards the heart. The thymus gland is a lymphatic organ and an endocrine gland that is found just behind the sternum.

Several organs are also included in the lymphatic system –. The lymphoid organs assist the lymphatic system. It’s made up of two lobes of lymphoid tissue. Once mature, these cells leave the thymus and are transported via blood vessels to the lymph nodes and spleen. They are located deep inside the body, for example, around the heart and lungs, also closer to the outer surface, like armpits and groin. Like other lymphatic organs, the spleen is surrounded by a capsule whose extensions into the spleen form trabeculae.

It is located on the left side of the body, inferior to the diaphragm and at the left edge of the stomach. The lymphatic system is commonly divided into the primary lymphoid organs, which are the sites of B and T cell maturation, and the secondary lymphoid organs, in which further differentiation of lymphocytes occurs. They include the thymus, spleen, tonsils, and appendix, along with some special tissue in the gut: The thymus: The thymus is located in the thoracic cavity, just under the neck. Unlike the blood vascular system, lymphatic circulation is not a closed loop. The thymus gland is the main organ of the lymphatic system.

Humans have several hundreds of lymph nodes. The lymphatic system consists of open-ended vessels, lymph nodes, and organs such as the tonsils, spleen, and thymus. The thymus gland. Lymph reenters the cardiovascular system at subclavian veins situated near the neck. Each lobe has a medulla surrounded by a cortex. Its primary function is to promote the development of specific cells of the immune system called T-lymphocytes. Measuring about 12 cm (5 inches) in length, the spleen is the largest lymphatic organ. Primary lymphoid organs include the thymus, bone marrow, fetal liver, and, in birds, a structure called the bursa of Fabricius.

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