Read the following characteristics of a lymphoid organ: (i) It is a large bean-shaped organ. (ii) It mainly contains lymphocytes and phagocytes. (iii) It acts as a filter of the blood by trapping blood-borne microorganisms. Identify the organ based on the above description.

Step-by-step solution

The spleen is a large bean-shaped secondary lymphoid organ that mainly contains lymphocytes and phagocytes. It acts as a filter of the blood by trapping blood-borne microorganisms. Lymph nodes are small solid structures that trap microorganisms present in the lymph and tissue fluid, not the blood. Thymus is a lobed primary lymphoid organ located near the heart. Tonsils are secondary lymphoid organs but do not fit the description of a large bean-shaped blood filter. Answer: Spleen