What is the lymph system made of?

When the blood flows in the blood capillaries, some of it leaks out. This leaked out fluid, devoid of red blood cells, is known as lymph.

It contains many white cells which are used to fight infection and also fat droplets collected from the intestines. The lymph travels throughout the body in the tubes forming a lymph system and finally returns to the blood supply near the heart.


The lymph system has various lymph glands which contain large number of white blood cells. These cells destroy bacteria and debries from dead cells. In case of an infection, the white cells in these glands multiply very fast to fight the germs. This makes the glands swollen which is a sign of infection.

White blood cells are made in the lymph nodes of adults and in children in the thymus.