Question

Which of the following is classified as a primary lymphoid organ where lymphocytes are produced and mature into antigen-sensitive cells?

Options

• Bone marrow

• MALT (Mucosa-Associated Lymphoid Tissue)

• Lymph nodes

• Spleen

Answer 1

Primary lymphoid organs are sites where lymphocytes are produced and mature into antigen-sensitive cells. Bone marrow is a primary lymphoid organ where all blood cells originate and B-lymphocytes mature. Lymph nodes, spleen, and MALT are secondary lymphoid organs where mature lymphocytes interact with antigens and proliferate.