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  •  Secondary lymphatic organs and tissues are the sites whereOption: 1 Most immune responses occurOp

 Secondary lymphatic organs and tissues are the sites where

Option: 1

Most immune responses occur


Option: 2

 Immature T-cells migrate to form when they leave the red bone marrow


Option: 3

Stem cells divide and develop into T- and B-cells


Option: 4

Allergic responses are mediated    


Answers (1)

best_answer

 

 

As we have already discussed in Immune System in Humans -

 

  • The thymus is a lobed organ located near the heart and beneath the breastbone. 
  • The thymus is quite large at the time of birth but keeps reducing in size with age and by the time puberty is attained it reduces to a very small size. 
  • Both bone-marrow and thymus provide micro-environments for the development and maturation of T-lymphocytes. 

Hence, the correct answer is option b.
 

Posted by

Deependra Verma

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