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ZoologyNEET 2024Immunity, vaccination, AIDS, cancer

Human Health and Disease

Given below are two statements:

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 micro-environments for the development and maturation of T-lymphocytes.

In the light of the above statements, choose the most appropriate answer from the options given below:

  1. A.Both Statement I and Statement II are incorrect.
  2. B.Statement I is correct but Statement II is incorrect.
  3. C.Statement I is incorrect but Statement II is correct.
  4. D.Both Statement I and Statement II are correct.✓

Solution

Bone marrow is the primary lymphoid organ where all blood cells including lymphocytes are made (I true), and both bone marrow and thymus provide the micro-environment for lymphocyte maturation — T cells maturing in the thymus (II true).

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