Which gland undergoes atrophy in adults?

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(B) The $Thymus$ gland is a lobular structure located between the lungs behind the sternum on the ventral side of the aorta.It plays a major role in t

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Thymus

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(B) The $Thymus$ gland is a lobular structure located between the lungs behind the sternum on the ventral side of the aorta.It plays a major role in the development of the immune system.This gland secretes the peptide hormones called $Thymosins$.$Thymosins$ play a major role in the differentiation of $T$-lymphocytes,which provide cell-mediated immunity.In addition,$Thymosins$ also promote the production of antibodies to provide humoral immunity.$Thymus$ is degenerated in old individuals resulting in a decreased production of $Thymosins$,which leads to a weaker immune response in the elderly.

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