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Question

A gland called 'Clock of ageing' that gradually reduces and degenerates in ageing is

A
Thyroid
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B
Thymus
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C
Parathyroid
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D
Pituitary
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Solution

The correct option is B Thymus
  • The thymus is the primary specialized lymphoid organ of the immune system. It gradually reduces with age.
  • T cells or T lymphocytes mature within the thymus. Thymus reduces with age through a process called involution.
  • This process has been observed in many vertebrates. This process starts during puberty, in middle age, the thymus changes from a primary lymphoid organ into fatty tissue.
    So, the correct answer is option B.

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