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Tamil Nadu Board of Secondary EducationHSC Science Class 12

Given below are some human organs. Identify one primary and one secondary lymphoid organ. Explain its role. - Zoology

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Question

Given below are some human organs. Identify one primary and one secondary lymphoid organ. Explain its role.

Liver, thymus, stomach, thyroid, tonsils

Short Note

Solution

Primary lymphoid organ -  thymus

Secondary lymphoid organ - tonsils

Immunocompetency of T cells is achieved in Thymus Whereas tonsils help to fight viral and bacterial infections.

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Lymphoid Organs
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Chapter 8: Immunology - Evaluation [Page 145]

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Samacheer Kalvi Biology (Zoology) [English] Class 12 TN Board
Chapter 8 Immunology
Evaluation | Q 15. | Page 145
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