2025 Human Health and DiseaseLymphoid Organs Easy Question 2 of 2 in Lymphoid Organs

After maturation, in primary lymphoid organs, the lymphocytes migrate for interaction with antigens to secondary lymphoid organ(s)/tissue(s) like:
A. thymus
B. bone marrow
C. spleen
D. lymph nodes
E. Peyer's patches
Choose the correct answer from the options given below:

A B, C, D only
B A, B, C only
C E, A, B only
D C, D, E only

The answer is D.

Solution

Spleen, lymph nodes, and Peyer's patches are secondary lymphoid organs.

Primary lymphoid organs are bone marrow and thymus where immature lymphocytes differentiate. Mature lymphocytes migrate to secondary lymphoid organs/tissues (spleen, lymph nodes, tonsils, Peyer's patches of small intestine, appendix) to interact with antigens.

Concept Primary vs Secondary Lymphoid Organs

Lymphoid Organs in past papers

2 questions from this chapter have appeared across 2 exam years.