The Human Lymphatic System
The lymphatic system drains extra fluid (called lymph) that has passed out of the blood and into tissues and returns it back to the blood.
The lymphatic system is a circulatory system made up of lymph vessels much like blood vessels.
The lymphatic system also includes tissues and organs that make, store and release lymphocytes (a type of white blood cell). These tissues and organs (called lymphatic or lymphoid tissue) also monitor the lymph for germs, foreign substances and abnormal cells and remove waste products and bacteria from the lymph.
The lymphatic system includes the tonsils, spleen, thymus, lymph nodes and lymph vessels and is an important part of the immune system.
The lymphatic system also helps to maintain blood pressure and transports some hormones, nutrients and waste products.
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