16 Facts About Lymphatic system

Lymphatic system, or lymphoid system, is an organ system in vertebrates that is part of the immune system, and complementary to the circulatory system.

Unlike the circulatory system that is a closed system, the lymphatic system is open.

One of the main functions of the lymphatic system is to provide an accessory return route to the blood for the surplus three litres.

Lymphatic system was first described in the 17th century independently by Olaus Rudbeck and Thomas Bartholin.

Lymphoid tissue associated with the lymphatic system is concerned with immune functions in defending the body against infections and the spread of tumours.

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Lymphatic system vessels, called lymph vessels, are thin-walled vessels that conduct lymph between different parts of the body.

Tissues of the lymphatic system are responsible for maintaining the balance of the body fluids.

Lymphatic system tissues begin to develop by the end of the fifth week of embryonic development.

Lymphatic system vessels develop from lymph sacs that arise from developing veins, which are derived from mesoderm.

Lymphatic system plays a major role in the body's immune system, as the primary site for cells relating to adaptive immune system including T-cells and B-cells.

Cells in the lymphatic system react to antigens presented or found by the cells directly or by other dendritic cells.

Lymphatic system identified the thoracic duct but failed to notice its connection with the lacteals.

Lymphatic system suspected that fluid to be chyle as its flow increased when abdominal pressure was applied.

Lymphatic system traced this fluid to the thoracic duct, which he then followed to a chyle-filled sac he called the chyli receptaculum, which is known as the cisternae chyli; further investigations led him to find that lacteals' contents enter the venous system via the thoracic duct.

Lymphatic system learned that they emptied into the thoracic duct and that they had valves.

Lymphatic system announced his findings in the court of Queen Christina of Sweden, but did not publish his findings for a year, and in the interim similar findings were published by Thomas Bartholin, who additionally published that such vessels are present everywhere in the body, not just in the liver.