what is the lymphatic system and what makes it up
What the lymphatic system is. The lymphatic system is a system of thin tubes and lymph nodes that run throughout the body. These tubes are called lymph vessels or lymphatic vessels. The lymph system is an important part of our immune system. It plays a role in fighting bacteria and other infections and destroying old or abnormal cells, such as cancer cells. You can read detailed information about the immune system and cancer.