Question

Given figure shows the human lymphatic system with some part marked as $A,B,C$ and $D$ identify the correct part

• A. A - lymph nodes (primary lymphoid organ), B - thymus (primary lymphoid organ), C - spleen (secondary lymphoid organ), D - bone marrow (secondary lymphoid organ)
• B. A - lymph nodes (primary lymphoid organ), B - thymus (secondary lymphoid organ), C - spleen (primary lymphoid organ), D - bone marrow (primary lymphoid organ)
• C. A - lymph nodes (secondary lymphoid organ), B - thymus (primary lymphoid organ), C-spleen (secondary lymphoid organ), D - bone marrow (primary. lymphoid organ)
• D. A- lymph nodes (primary lymphoid organ), B - thymus (secondary lymphoid organ), C - spleen (secondary lymphoid organ), D - bone marrow (secondary lymphoid organ)

Answer 1

Answer: (C)

Lymphatic system is the network of vessels through which lymph drains from the tissues into the blood. In the given figure of human lymphatic system, the parts marked as A, B, C and D are respectively lymph nodes (secondary lymphoid organ), thymus (primary lymphoid organ), spleen (secondary lymphoid organ), and bone marrow (primary lymphoid organ).