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The lymphatic system is crucial for immune defense, fluid balance, and nutrient transport. It includes lymphatic vessels, nodes, and organs that filter lymph and support lymphocyte maturation. Disorders such as lymphedema and lymphoma highlight its importance to health.
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Lymphatic vessels are similar to veins and capillaries and contain one-way valves for the unidirectional flow of lymph
Distribution of Lymph Nodes
Lymph nodes are located at key locations throughout the body, including the neck, armpits, abdomen, and groin
Function of Lymph Nodes
Lymph nodes are critical immune sites where lymphocytes are stored and activated, leading to antibody production and direct attack on infected or cancerous cells
Primary lymphoid organs, such as the bone marrow and thymus gland, are responsible for lymphocyte production and maturation, while secondary lymphoid organs, including lymph nodes, the spleen, and mucosa-associated lymphoid tissues, initiate and refine immune responses
The lymphatic system maintains fluid balance by returning excess interstitial fluid to the bloodstream, preventing edema
The lymphatic system absorbs and transports dietary lipids and fat-soluble vitamins from the intestines to the blood via specialized lymphatic capillaries called lacteals
The lymphatic system acts as a filtration mechanism, with lymph nodes removing pathogens and debris from the lymph fluid, contributing to the body's defense against infections and diseases
Lymphadenitis is the inflammation of lymph nodes
Lymphedema is the swelling due to lymphatic obstruction
Lymphoma is a type of cancer that affects the lymphatic system
Lymphatic filariasis is a parasitic infection that causes severe swelling and affects the lymphatic system