Question

Give the name of the endocrine gland which is prominent at birth but gets gradually atrophied in the adult stage.

Hint:

The thymus is crucial for early immune system development; however, its reduced function in later life does not markedly affect immunity, as memory T-cells continue to function.

Answer 1

The thymus gland serves as a crucial primary lymphoid organ within the immune system, situated in the upper thorax just behind the sternum. 
Role of the Thymus: 
(i) The thymus is vital for the development and maturation of T-lymphocytes (T-cells), which are key to adaptive immunity. 
(ii) In childhood, it actively generates immune cells. 
(iii) The gland undergoes involution (gradual shrinkage) starting at puberty, with its functions increasingly assumed by other immune structures like lymph nodes and the spleen. 
Involution of the thymus is a normal physiological process, leading to its replacement by fatty tissue in adulthood.