Final answer:
Aging affects the CNS, CV system, and pulmonary system. The CNS may experience a decrease in brain cells and an increased risk of cognitive impairment. The CV system may develop heart diseases, while the pulmonary system may be more prone to respiratory syndromes.
Step-by-step explanation:
1) CNS effects of aging:
As people age, the number of brain cells decreases, and nearly half of those over 85 years exhibit mild cognitive impairment. Diseases like Alzheimer's, which cause serious mental function losses, become more common.
2) CV system effects of aging:
With age, the incidence of heart diseases increases. The cardiovascular system may become less efficient, leading to conditions like hypertension and atherosclerosis.
3) Pulmonary system effects of aging:
Respiratory syndromes, like chronic obstructive pulmonary disease (COPD), are more likely to develop in the elderly. Reduced lung function and decreased elasticity of lung tissues are common.