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	Primary lymphoid organs are the sites where immature lymphocytes are produced and undergo maturation to become antigen-sensitive lymphocytes.	Secondary lymphoid organs are the sites where mature lymphocytes interact with antigens, undergo proliferation, and initiate an active immune response.
Examples	Bone marrow, Thymus	Lymph nodes, Spleen, Tonsils, Peyer’s patches, Appendix