Biology · Human Health and Diseases
Which of the following statements is NOT correct regarding human lymphoid organs?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Swollen or painful lymph nodes are often a clinical sign that the immune system is actively fighting an infection.
- 2The thymus is located behind the breastbone, above the heart, and is categorized as a secondary lymphoid organ.✓
- 3Bone marrow is a sponge-like tissue found inside bones and is categorized as a primary lymphoid organ.
- 4The spleen stores and breaks down platelets (thrombocytes), which are responsible for blood clotting.
Correct answer
The thymus is located behind the breastbone, above the heart, and is categorized as a secondary lymphoid organ.
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