Lymph nodes are an important part of the immune system. Lymph fluid is blood plasma that has already delivered nutrients to tissues in the body, absorbed metabolic waste, and reentered the lymph system. Lymph nodes filter this fluid before it reenters the heart to become blood plasma. This is an essential part of the immune system. Without lymph nodes, a person would die within three days. Lymph nodes filter out bacteria and disease, in addition to improving quality of life. Effective lymph node filtering keeps (among other thing) skin, digestion, and internal organs healthy.
Lymph nodes are used to filter fluids, catch viruses and bacteria, as well as other unknown objects. The white blood cells then destroy these things. They are small, bean-shaped glands that are found mainly in your neck, under arms, and groin.
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