Read the following passage and answer the question : The primary lymphoid organs are bone marrow and thymus, where immature lymphocytes differentiate into antigen sensitive Iymphocytes. They migrate to secondary lymphoid organ like spleen, lymph nodes, tonsils, paver’s patches of small intestine and appendix. All blood cells including lymphocytes are produced in bone marrow which is main lymphoid organ. Spleen is large reservoir of erythrocytes. [tis large bean shaped organ mainly containing lymphocyte and phagocyte. It acts as filter of blood by trapping blood borne micro organism. Lymph nodes are small solid structures located at different points along, Iymphatic system., Antigens trapped in Iymph node are responsible for activation of Iymphocytes present there and cause the immune response. There is lymphoid tissue located within. Lining of mayor tracts like respiratory, digestive ad urinogenital tracts called mucous associated Iymphoid tissue (MALT).
Which of the following is NOT secondary lymphoid organ ?
Read the following passage and answer the question : The primary lymphoid organs are bone marrow and thymus, where immature lymphocytes differentiate into antigen sensitive Iymphocytes. They migrate to secondary lymphoid organ like spleen, lymph nodes, tonsils, paver’s patches of small intestine and appendix. All blood cells including lymphocytes are produced in bone marrow which is main lymphoid organ. Spleen is large reservoir of erythrocytes. [tis large bean shaped organ mainly containing lymphocyte and phagocyte. It acts as filter of blood by trapping blood borne micro organism. Lymph nodes are small solid structures located at different points along, Iymphatic system., Antigens trapped in Iymph node are responsible for activation of Iymphocytes present there and cause the immune response. There is lymphoid tissue located within. Lining of mayor tracts like respiratory, digestive ad urinogenital tracts called mucous associated Iymphoid tissue (MALT).
Which of the following is NOT secondary lymphoid organ ?
Tonsils
Thymus
Appendix
Payer’s Patches
The Correct Option is B
Solution and Explanation
The option that is NOT a secondary lymphoid organ according to the passage is "Thymus."
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Concepts Used:
Immune System
It consists of tissues, cells, soluble molecules like antibodies and lymphoid organs. The WBC cells called the leucocytes have a significant role as they seek out to destroy the disease-causing organisms. These leucocytes are stored in different locations in the body including the spleen, bone marrow, and thymus. These organs are called as the lymphoid organs. The leucocytes are also present in the lymph nodes of the body.It is considered as the main lymphoid orga and. It produces all the blood cells including the lymphocytes. The thymus is an organ that is present near to the heart, beneath the breastbone.
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