Identify the correct group for primary lympho | vedclass

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(D) In the human immune system,lymphoid organs are classified into primary and secondary lymphoid organs.Primary lymphoid organs are the sites where l

Vedclass · Accepted Answer

Thymus,Bone marrow

Vedclass · Answer

(D) In the human immune system,lymphoid organs are classified into primary and secondary lymphoid organs.Primary lymphoid organs are the sites where lymphocytes originate and/or mature and become antigen-sensitive.The two main primary lymphoid organs are the $Bone \ marrow$ and the $Thymus$.Secondary lymphoid organs,such as the $Spleen$,$Lymph \ nodes$,$Tonsils$,and $Appendix$,provide the sites for interaction of lymphocytes with the antigen,which then proliferate to become effector cells.

Column $I$ (Type of Immunity)	Column $II$ (Example)
$i$. Natural acquired active	$a$. $BCG$ Vaccine
$ii$. Artificial acquired active	$b$. Immunity against measles
$iii$. Natural acquired passive	$c$. Colostrum
$iv$. Artificial acquired passive	$d$. Injections against rabies

Identify the correct group for primary lymphoid organs.

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