Add Yahoo as a preferred source to see more of our stories on Google. From left: T.R. Knight, Katherine Heigl, Sandra Oh and Ellen Pompeo in the season 1 ‘Grey’s Anatomy’ episode ‘Who’s Zoomin’ Who?’ ...

The familiar heart symbol doesn’t look much like a real human heart—and that mismatch is the whole mystery. If the shape is supposed to stand ...

The right coronary artery supplies blood to a part of the heart. To do this effectively, it branches off into smaller arteries, such as the conus artery and the sinoatrial nodal branch. Each branch ...

The coronary sinus (CS) refers to a collection of veins that join together to form a large blood vessel. This vein is located between the left atrium and the left ventricle of the heart. A collection ...