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lymph node

lymph gland

Any of the rounded masses of lymphoid tissue that are surrounded by a capsule of connective tissue, are distributed along the lymphatic vessels, and contain numerous lymphocytes which filter the flow of lymph.

On this page
प्रकार Bone
शरीर तंत्र Lymphatic/Immune
मूल संरचना immune organ
लैटिन नाम lymph gland
FMA ID 5034

Frequently Asked Questions

What is the internal anatomy of a lymph node?

Lymph nodes are encapsulated by a fibrous capsule from which trabeculae extend inward. The outer cortex contains follicles (B cell zones) with germinal centers during immune responses. The inner paracortex is T cell-rich. The medulla contains medullary cords (antibody-secreting plasma cells) and sinuses draining to the efferent lymphatic vessel at the hilum.

How do lymph nodes filter lymph?

Lymph enters lymph nodes through multiple afferent lymphatic vessels and percolates through a network of subcapsular, cortical, and medullary sinuses. Macrophages lining these sinuses phagocytose pathogens, cell debris, and foreign particles, while lymphocytes sample antigens to initiate adaptive immune responses.

Why do lymph nodes swell during infection?

Lymph node enlargement (lymphadenopathy) occurs when lymphocytes rapidly proliferate in response to antigens, filling lymphoid follicles with activated B and T cells. Increased macrophage activity and edema within the node also contribute to swelling, which clinically signals ongoing immune activity or infection.

References

  1. Foundational Model of Anatomy — FMA:5034 Reference anatomy ontology (University of Washington)
  2. UBERON — UBERON:0000029 Cross-species anatomy ontology (EMBL-EBI Ontology Lookup Service)
  3. Wikipedia — lymph node Encyclopedia article (verified cross-reference)

चिकित्सा अस्वीकरण

यह सामग्री केवल शैक्षिक और सूचनात्मक उद्देश्यों के लिए है। इसे पेशेवर चिकित्सा सलाह, निदान या उपचार के विकल्प के रूप में नहीं माना जाना चाहिए। किसी चिकित्सा स्थिति के बारे में आपके किसी भी प्रश्न के लिए हमेशा अपने चिकित्सक या अन्य योग्य स्वास्थ्य प्रदाता से सलाह लें। इस वेबसाइट पर पढ़ी गई किसी बात के कारण कभी भी पेशेवर चिकित्सा सलाह को नजरअंदाज न करें या इसे लेने में देरी न करें।

Educational Disclaimer

This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.

Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.