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Lymph Nodes

A rounded mass of lymphatic tissue that is surrounded by a capsule of connective tissue. Lymph nodes filter lymph (lymphatic fluid), and they store lymphocytes (white blood cells). They are located along lymphatic vessels. Also called lymph gland.

PubMed Health Glossary
(Source: NIH - National Cancer Institute)

About Lymph and Lymph Nodes

Lymph travels around the body through a network of vessels in much the same way that blood travels around the body through the blood vessels. Whereas the blood carries nutrients and other substances into our tissues, the lymph vessels drain fluid from the tissues and transport it to the lymph nodes.

These small gland-like masses of tissue filter out and destroy bacteria and other harmful substances. The bigger lymph vessels then carry the cleaned fluid back to the vein called the superior vena cava, where it enters the blood stream.

The lymph or lymphatic system is an important part of our body's system to defend us against infections... Read more about the Lymph Nodes

Terms to know

Bone Marrow
The soft, sponge-like tissue in the center of most bones. It produces white blood cells, red blood cells, and platelets.
Lymph
The clear fluid that travels through the lymphatic system and carries cells that help fight infections and other diseases. Also called lymphatic fluid.
Lymphatic System
The tissues and organs that produce, store, and carry white blood cells that fight infections and other diseases. This system includes the bone marrow, spleen, thymus, lymph nodes, and lymphatic vessels (a network of thin tubes that carry lymph and white blood cells). Lymphatic vessels branch, like blood vessels, into all the tissues of the body.
Lymphatic Vessels
A thin tube that carries lymph (lymphatic fluid) and white blood cells through the lymphatic system. Also called lymph vessel.
Lymphocytes
A lymphocyte is a type of white blood cell that is part of the immune system. There are two main types of lymphocytes: B cells and T cells. The B cells produce antibodies that are used to attack invading bacteria, viruses, and toxins. The T cells destroy the body's own cells that have themselves been taken over by viruses or become cancerous.

Terms to know

Bone Marrow
The soft, sponge-like tissue in the center of most bones. It produces white blood cells, red blood cells, and...
Lymph
The clear fluid that travels through the lymphatic system and carries cells that help fight infections and ot...
Lymphatic System
The tissues and organs that produce, store, and carry white blood cells that fight infections and other disea...
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