Immune system ageing The immunological theory of ageing proposes that alterations in the immune system contribute to the changes associated with old age. With age, the immune system is thought to become less efficient, with a reduced capacity to deal with infection and a greater likelihood of auto-immune reactions. Although it is well established that the functional properties of T cells decrease with age, its biochemical and molecular nature is poorly understood. The available data suggests that changes in the signal transduction machinery are responsible for the impairment of T cell function during ageing. For further information about immunological alterations and ageing.
Cardiovascular system ageing The cardiovascular system is composed of the heart and blood vessels.
The heart grows slightly larger with age and its performance change s . In addition, as one ages, blood vessels lose their elasticity . Consequently, normal blood pressure and blood pressure during exercise slowly increase as we age. You can test your own risk of stroke. Mitochondria, which are the energy-producing bodies within a cell, have their own genome.