Multiple Choice
Which of the following is the largest lymphoid organ in the body?
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20. The Lymphatic System
Overview of Lymphoid Organs
Multiple Choice
Which of the following lymphoid organs is NOT correctly matched with its function?
A
Lymph nodes – site of B cell maturation
B
Thymus – site of T cell maturation
C
Tonsils – trap pathogens entering through the mouth and nose
D
Spleen – filters blood and removes old red blood cells
Verified step by step guidance1
Step 1: Begin by understanding the primary functions of each lymphoid organ mentioned in the problem. Lymph nodes, thymus, tonsils, and spleen are all part of the lymphatic system, which plays a key role in immunity and fluid balance.
Step 2: Recall the specific function of lymph nodes. Lymph nodes are small, bean-shaped structures that filter lymph (a fluid containing white blood cells) and house immune cells like B cells and T cells. However, B cell maturation primarily occurs in the bone marrow, not in lymph nodes.
Step 3: Review the function of the thymus. The thymus is the site of T cell maturation, where immature T cells develop into functional immune cells capable of recognizing pathogens.
Step 4: Examine the role of tonsils. Tonsils are lymphoid tissues located in the throat and nasal passages. Their primary function is to trap and destroy pathogens entering through the mouth and nose, providing a first line of defense.
Step 5: Analyze the function of the spleen. The spleen filters blood, removes old or damaged red blood cells, and helps in immune responses by housing white blood cells. This function is correctly matched in the problem.
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