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[edit | edit source]
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[edit | edit source]
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[edit | edit source]
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[edit | edit source]
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Contributors: Prab R. Tumpati, MD
