OVERVIEW OF THE IMMUNE SYSTEM
LYMPHATIC TISSUES AND ORGANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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thymus
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spleen
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tonsils
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heart
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Detailed explanation-1: -Summary: A new study provides evidence that immune cells called T lymphocytes, or T cells, can develop in human tonsils. The cells have been thought to develop only in the thymus, an organ of the immune system that sits on the heart.
Detailed explanation-2: -The tonsils, spleen, and lymph nodes are referred to as secondary lymphoid organs. These organs do not produce or mature lymphocytes. Instead, they filter lymph and store lymphocytes.
Detailed explanation-3: -Total white blood cell count was significantly increased in the tonsillitis group compared with the mononucleosis group (16, 560 cells per microliter vs. 11, 400 cells per microliter), but the lymphocyte count was higher in the mononucleosis group (6, 490 cells per microliter vs. 1, 590 cells per microliter).