Lymph Nodes
Lymph Nodes
Lymph nodes (pronunciation: /ˈlɪmf ˈnoʊdz/) are small, bean-shaped structures that produce and store cells that fight infection and disease. They are a vital part of the immune system and are primarily responsible for the immune response.
Etymology
The term "lymph node" comes from the Latin lympha, meaning water, and the Greek nodos, meaning knot. This is likely due to the nodes' function in filtering lymphatic fluid.
Function
Lymph nodes are responsible for the production of immune cells (such as lymphocytes, monocytes, and plasma cells) that help the body fight off infections. They also act as filters for the lymphatic system, trapping bacteria, viruses, and other foreign substances, which are then destroyed by special white blood cells called lymphocytes.
Location
Lymph nodes are located throughout the body, including the neck, armpits, chest, abdomen, and groin. They are connected by lymphatic vessels, which carry lymphatic fluid, white blood cells, and other immune system components.
Related Terms
- Lymphatic system: The network of organs, nodes, ducts, and vessels that produce and transport lymph from tissues to the bloodstream.
- Lymph: A clear, colorless fluid that carries white blood cells, especially lymphocytes, throughout the body.
- Lymphocytes: A type of white blood cell that is part of the immune system, there are two main types B lymphocytes and T lymphocytes.
- Immune system: The body's defense against infectious organisms and other invaders.
External links
- Medical encyclopedia article on Lymph Nodes
- Wikipedia's article - Lymph Nodes
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