Looked in the mirror lately only to find a few more wrinkles and gray hairs? Those are just a few of the changes you’re likely to notice as you get older. But what exactly is going on with your body? Here’s a list of the natural changes you can expect as you age. Over time, your heart muscle becomes less efficient, working harder to pump the same amount of blood through your body. In addition, your blood vessels lose elasticity. Hardened fatty deposits may form on the inner walls of your arteries (atherosclerosis), narrowing the vessels. The natural loss of elasticity, in combination with atherosclerosis, makes your arteries stiffer, causing your heart to work even harder to pump blood through them. This can lead to high blood pressure (hypertension).