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Old people have weak immune system. What could be the reason?
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Solution
Thymus gland and its hormone:
Thymus gland is a lobe-like structure located in the chest between the lungs, behind the sternum. The gland secretes thymosin whose functions are as follows:-
- Stimulates the production and differentiation of T cells thereby helping in cell mediated immunity.
- Plays a minor role in stimulating the B cells to produce antibodies thus improving the humoral immunity.
Effect of aging on thymus gland:
The thymus gland degenerates with age. This leads to a drop in the level of thymosin. This declines the differentiation of T cells and production of antibodies. As a result, the old people fall sick quite often due to their weakened immunity.
Thymus gland is a lobe-like structure located in the chest between the lungs, behind the sternum. The gland secretes thymosin whose functions are as follows:-
- Stimulates the production and differentiation of T cells thereby helping in cell mediated immunity.
- Plays a minor role in stimulating the B cells to produce antibodies thus improving the humoral immunity.
Effect of aging on thymus gland:
The thymus gland degenerates with age. This leads to a drop in the level of thymosin. This declines the differentiation of T cells and production of antibodies. As a result, the old people fall sick quite often due to their weakened immunity.
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