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Fill in the blanks The …..a……. Lympho...

Fill in the blanks
The …..a……. Lymphoid organs provide the sites for interaction of lymphocytes with antigen which then proliferate to become …..b…..
2 . The thymus is a lobed organ located near the heart and beneath the ….C…..
3. Spleen has a large reservoir of .....d.....

A

a - primary , b - antigen sensitive cells, c - collar bone , d - lymphocytes

B

a - secondary , b - receptor cells, c - breastbone, d - erythrocytes

C

a - primary , b - effector cells , c - breastbone

D

a - secondary , b - effector cells, c - breastbone , d - erythrocytes

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The correct Answer is:
D
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The _________1_____________ is the main lymphoid organ where all blood cells _________2_____________ lymphocytes are produced. The _________3_____________ is a lobed organ located near the heart and beneath the breastbone. The _________3_____________ 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 _________1_____________ and _________3_____________ provide micro-environments for the development and maturation of T-lymphocytes.

Fill in the blanks: ...2.. provides energy and organic materials for growth and repair of tissues. Each tooth is embedded in a socket of J aw bone. This type of attachment is called ...b... An adult human has 32 permanent teeth which are of four different types. This is called ....C...dentition. Majority of mammals including human being forms two sets of teeth during their life. This type of dentition is called ....d.. .

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