what happen in lymphoid organs with respect to immunity.
what happen in lymphoid organs with respect to immunity.
Lymphoid organs are of two types − primary lymphoid organs and secondary lymphoid organs.
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Primary lymphoid organs consist of bone marrow and thymus. Here, immature lymphocytes are differentiated to form antigen-sensitive lymphocytes.
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Bone marrow − Here, all blood cells including lymphocytes are produced.
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Thymus − It is responsible for maturation of T-lymphocytes. This lobed organ is situated near the heart and keeps on reducing in size as the age increases.
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Secondary lymphoid organs − Lymphocytes migrate here after attaining maturity. It includes spleen, lymph nodes tonsils, Peyer’s patches, and appendix.
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Spleen − Large bean-shaped organ containing lymphocytes and phagocytes, which acts as a filter for blood
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Lymph nodes − Located at different points throughout the immune system, they trap the antigens present in lymph or tissue fluid, and these antigens cause activation of lymphocytes and generation of immune response.
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MALT (Mucosal-associated lymphoid tissue) − Lines major tracts (respiratory, digestive, urogenital, etc); constitutes 50% of lymphoid tissue in body
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Primary lymphoid organs consist of bone marrow and thymus. Here, immature lymphocytes are differentiated to form antigen-sensitive lymphocytes.
-
Bone marrow − Here, all blood cells including lymphocytes are produced.
-
Thymus − It is responsible for maturation of T-lymphocytes. This lobed organ is situated near the heart and keeps on reducing in size as the age increases.
-
-
Secondary lymphoid organs − Lymphocytes migrate here after attaining maturity. It includes spleen, lymph nodes tonsils, Peyer’s patches, and appendix.
-
Spleen − Large bean-shaped organ containing lymphocytes and phagocytes, which acts as a filter for blood
-
Lymph nodes − Located at different points throughout the immune system, they trap the antigens present in lymph or tissue fluid, and these antigens cause activation of lymphocytes and generation of immune response.
-
-
MALT (Mucosal-associated lymphoid tissue) − Lines major tracts (respiratory, digestive, urogenital, etc); constitutes 50% of lymphoid tissue in body
