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Solution


Q.

Given below are two statements:                                                                              [2024]

Statement I: Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced.
Statement II: Both bone marrow and thymus provide microenvironments for the development and maturation of T-lymphocytes.

In the light of the above statements, choose the most appropriate answer:
1 Both Statement I and Statement II are correct  
2 Both Statement I and Statement II are incorrect  
3 Statement I is correct but Statement II is incorrect  
4 Statement I is incorrect but Statement II is correct  

Ans.

(1)

Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced. Both bone marrow and thymus provide micro-environments for the development and maturation of T-lymphocytes. After maturation the lymphocytes migrate to secondary lymphoid organs like spleen, lymph nodes, tonsils, Peyer’s patches of small intestine and appendix.