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The lymphatic system works as part of the immune system to circulate white blood cells, lymph, chyle (lymph containing fat) and waste products from the interstitial space to lymph organs (lymph nodes and the spleen). Lymph nodes filter lymph fluid.

What are lymph nodes?

There are hundreds of lymph nodes in the human body.

There are 2 types of lymph nodes which filter lymph fluid:

1/ Regional lymph nodes are groups of lymph nodes that form lymphatic basins into which lymph drains from different skin regions or organs.

2/ Interval lymph nodes are located in the limbs and the lymph vessels pass through them on the way to the regional lymph nodes, such as the epitrochlear (elbow) and popliteal (behind the knee).

In the video below Professor Neil Piller (Lymphologist from Flinders University) talks about lymph nodes.