As We Age,our Thymus Shrinks,or Atrophies,by a Process Called Involution,yet

question 23

Essay

As we age,our thymus shrinks,or atrophies,by a process called involution,yet T-cell immunity is still functional in old age.
A.Explain how T-cell numbers in the periphery remain constant in the absence of continual replenishment from the thymus.
B.How does this differ from the maintenance of the B-cell repertoire?

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Definitions:

Retinoblastoma

A rare, malignant tumor of the retina usually occurring in children.

Germ Cell

A reproductive cell that can give rise to gametes such as sperm and ova, involved in sexual reproduction.

Malignant Tumor

A cancerous growth capable of invading and destroying nearby tissue and potentially spreading to other parts of the body.

Ophthalmologist

A medical doctor specializing in the diagnosis and treatment of eye diseases and conditions.