Multiple Choice
Which of the following is the largest lymphatic organ, lined with macrophages that help filter blood?
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41. Immune System
Immune System
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Which lymphoid organ atrophies as humans age?
A
Spleen
B
Lymph nodes
C
Thymus
D
Tonsils
Verified step by step guidance1
Step 1: Understand the function of lymphoid organs. Lymphoid organs are part of the immune system and are responsible for producing and housing immune cells like lymphocytes (T cells and B cells). Examples include the thymus, spleen, lymph nodes, and tonsils.
Step 2: Learn about the thymus. The thymus is a primary lymphoid organ located in the chest, behind the sternum. It plays a crucial role in the development and maturation of T cells during early life.
Step 3: Recognize the process of thymus atrophy. As humans age, the thymus gradually shrinks and becomes less active in producing T cells. This process is called thymic involution, and it typically begins after puberty.
Step 4: Compare the thymus to other lymphoid organs. Unlike the thymus, other lymphoid organs like the spleen, lymph nodes, and tonsils do not undergo significant atrophy with age. They continue to play roles in immune responses throughout life.
Step 5: Conclude that the thymus is the lymphoid organ that atrophies as humans age, making it distinct from the spleen, lymph nodes, and tonsils.
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