Question

Largest lymphoid organ of body is
A. Liver
B. Kidney
C. Spleen
D. Pancreas

Answer 1

Hint: Lymphoid organs are the organs in which lymphocytes form and develop. The 5 main lymphoid organs are: Bone marrow, thymus, lymph nodes, spleen and tonsils.

Complete answer:
The lymphatic system is an organ system, which is a part of the circulatory system and the immune system. It is made up of a large network of lymphatic vessels, lymphatic or lymphoid organs, and lymphoid tissues. Lymphoid organs are the organs in which lymphocytes form and develop. Lymphoid organ is divided into two types: primary lymphoid organ and secondary lymphoid organ. Primary lymphoid organs are the organs in which lymphocytes form. They are bone marrow and thymus. The secondary lymphoid organs are the organs in which lymphocytes mature or prepare for attacking. The main secondary lymphoid organs are lymph nodes, spleen and tonsils.

So, our first option is the liver, which is the largest gland of the human body, not the largest lymphoid organ. Second option is a kidney. The only role of the kidney in lymphatic systems is elimination of toxic products from lymph. Third option is spleen. Spleen is a 2° lymphoid organ and it is the largest organ among all 5 lymphoid organs. Next option is pancreas. which we know, that the pancreas is not a lymphoid organ.

Hence, The correct answer is option (C).

Note: The spleen is an organ, which is present above the stomach and under the left side of the lower rib cage. The four main functions of the spleen are: 1. Clearance of microorganisms, 2. Synthesis of IgG, 3. Removal of abnormal RBCs and, 4. Hematopoiesis in some diseases.