What is the significance of the lymphatic system? What are the features of the movement of lymph through the vessels?

With the help of lymph circulation, tissue fluid outflows towards the heart, the composition of blood plasma is renewed, it is filtered and disinfected. Lymphocytes produced in the lymph nodes are involved in the body’s immune defense. Lymph moves from tissues to the venous system, its movement is facilitated by the contraction of the walls of the lymphatic vessels, negative intrathoracic pressure and valves on the inner walls of blood vessels.