Lymphatic+System

===Lymphatic system is a system which contains the network of vessels through which lymph is drained from the tissues into the blood. White Blood Cells engulf and digest the bacteria and the fungi, it is an important part of the body's defense system. Thoracic Duct is a passing upward in front of the spine and it drains into the left vein near the base of the neck. This is a very commom duct where the Lymph enters the blood circulation near the Heart. The Heart is a hollow muscular organ that pumps blood throughout and around the body. The Superior Vena Cava receives blood from the head, arms, and the chest, it empties it into the right Atrium of the Heart. It is formed from the Azygos and both Brachiocephalic veins. The Thymus is a Lymphoid organ situated in the neck of vertebrates that produce T-cells for the immune system. The human Thymus starts reducing it's size as humans approach puberty. The Spleen is an abdominal organ involved in the production and removal of blood cells in most vertebrates and it also forms part of the Immune system. Lymph nodes are each of a number of small swellings in the Lymphatic system where Lymph is filtered and Lymphocytes are formed. Finally, the Lymph vessels is a vascular duct that carries Lymph which is eventually added to the venous blood circulation.===