Lymph Node

Lymph Node

A Lymph node is an important part of the immune system. It is a small, bean-shaped structure that produces and stores cells that fight infection and disease. The lymph nodes are connected by lymphatic vessels, which carry lymph, a clear fluid containing white blood cells that help the body fight off illnesses.

Structure

Lymph nodes are kidney or oval shaped and range in size from a few millimeters to about 1–2 cm long. Each lymph node is surrounded by a fibrous capsule, which extends inside a lymph node to form trabeculae. The substance of the lymph node is divided into the outer cortex and the inner medulla.

Function

The primary function of lymph nodes is the production of lymphocytes, which play a crucial role in the body's immune response. They also act as filters, trapping foreign particles and bacteria that pass through them.

Clinical significance

Lymph nodes can become swollen or enlarged due to infection, disease, or cancer. This condition is known as lymphadenopathy. In some cases, the enlargement of lymph nodes can be a sign of a serious condition, such as lymphoma or metastasis.

See also

• Lymphatic system
• Lymphocyte
• Lymphadenopathy
• Lymphoma
• Metastasis

Lymph Node Resources
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