Aging is associated with greater rigidity in which anatomical structure?

Aging is associated with greater rigidity in which anatomical structure?

• A. Heart valves
• B. Cardiac muscle
• C. Capillary walls
• D. Vascular walls

Answer: (D)

Aging causes the arterial walls to lose their elasticity, a process driven by changes in the vessel wall structure—elastin breaks down and collagen content increases, often with calcification. This makes the arteries less compliant, so they become more rigid. This increased rigidity of the vascular walls, especially in large arteries like the aorta, is the classic age-related change and underlies higher systolic pressure and wider pulse pressure seen in older adults. While other structures can change with age, the most notable and consistent rigidity occurs in the vascular walls.

Aging causes the arterial walls to lose their elasticity, a process driven by changes in the vessel wall structure—elastin breaks down and collagen content increases, often with calcification. This makes the arteries less compliant, so they become more rigid. This increased rigidity of the vascular walls, especially in large arteries like the aorta, is the classic age-related change and underlies higher systolic pressure and wider pulse pressure seen in older adults. While other structures can change with age, the most notable and consistent rigidity occurs in the vascular walls.