​Lymphatic System

To better understand the disease process we have to start with where it all begins—the lymphatic system. The lymphatic system is responsible for the production, transport and filtration of lymph fluid throughout the body. In addition to its important circulatory functions, the lymphatic system also has important immunological functions (defense against infections, allergy, cancer and others).

The lymphatic system primarily consists of lymphatic vessels, which are similar to veins and capillaries of the circulatory system. The vessels are connected to lymph nodes, where the lymph is filtered. The tonsils, adenoids, spleen and thymus are all part of the lymphatic system.

On its way into the circulatory system, lymph passes through lymph nodes, which are stationed throughout the body. While the axilla and inguinal areas are the most well-known for lymph nodes, the head and neck also contain a large quantity, as do the intestines.

​Three main functions of the lymphatic system:

• Fight infection: The lymphatic system transports a watery, clear fluid called lymph which is full of lymphocytes. Lymphocytes are infection-fighting cells. Lymph fluid can also appear clearish yellow to white in appearance, depending on how concentrated it is.
• Lipid (fat) absorption: The lymphatic system absorbs lipids from the intestine and transports them to the blood.
• Drain excess fluid: Waste products, such as proteins and fluids are left behind as the blood circulates through the body’s tissues. This excess fluid is then drained through capillaries and into the lymphatic system where it is filtered and returned to the blood.​

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