The heart, brain, liver, lungs and many more organs are essential to the body's survival and living a long, healthy life. But experts believe an unlikely muscle you most likely only think about on leg ...

The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...

New research looks into how the retina and vascular system are connected. Retinal blood vessels can act like a window into heart health and overall health, including lifespan and aging markers, a ...