Old people have a weak immune system. What co | vedclass

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(B) The thymus gland is located on the dorsal side of the heart and the dorsal aorta.It secretes the hormone thymosin,which plays a major role in the

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Degeneration of the thymus gland

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(B) The thymus gland is located on the dorsal side of the heart and the dorsal aorta.It secretes the hormone thymosin,which plays a major role in the differentiation of $T$-lymphocytes,which provide cell-mediated immunity.In older individuals,the thymus gland undergoes gradual atrophy or degeneration.As a result,the production of thymosin decreases,leading to a weakened immune system in old people.

Old people have a weak immune system. What could be the reason?

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