Question

Give one significant difference between primary lymphoid organs and secondary lymphoid organs. Give one example of each.

Answer 1

Aspects	Primary Lymphoid Organs	Secondary Lymphoid Organs
Function	Sites where lymphocytes are produced and mature.	Sites where lymphocytes interact with antigens and initiate immune response.
Examples	Bone marrow, Thymus	Lymph nodes, Spleen, Tonsils, Peyer’s patches, Appendix