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Which of the following is/are the major lymphoid organ(s) that "train(s)" T lymphocytes to become immunocompetent?
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20. The Lymphatic System
Secondary Lymphoid Organs: The Spleen
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In addition to its lymphoid function, which organ holds a reservoir of platelets?
A
cisterna chyli
B
spleen
C
thymus
D
left lymphatic duct
E
tonsil
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Identify the primary function of each organ listed in the options to understand their roles in the body.
The cisterna chyli is a dilated sac at the lower end of the thoracic duct that serves as a storage area for lymph before it enters the venous system, not related to platelet storage.
The thymus is primarily involved in the maturation of T-lymphocytes (T-cells) and does not store platelets.
The left lymphatic duct, also known as the thoracic duct, is responsible for transporting lymph back into the bloodstream, not for storing platelets.
The spleen is an organ that has multiple functions, including filtering blood, recycling old red blood cells, and storing a reservoir of platelets, making it the correct answer.
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