The Primary Lymphoid Organ(s) Is/are The

Question

The primary lymphoid organ(s) is/are the
A) adenoids.
B) appendix.
C) Peyer's patches.
D) thymus.
E) tonsils.

Accepted Answer

The primary lymphoid organ is where immature lymphocytes mature and differentiate into fully functional lymphocytes. The thymus is a primary lymphoid organ where T-cells undergo maturation and differentiation before they move to other lymphoid organs. Adenoids, appendix, Peyer's patches, and tonsils are secondary lymphoid organs.