The left ventricle pumps the oxygen-rich blood to all parts of the body. Do right and left seem backward? That's because you're looking at an illustration of somebody else's heart. To think about ...

The heart works harder when you stand up. Gravity causes blood to pool in the lower parts of your body, so the heart has to ...

This colorful tapestry is a section of heart tissue from a zebrafish. The pink clusters are T cells, immune cells that help defend against disease. This colorful tapestry is a section of heart tissue ...

She’d never had heart problems before ... They made a game plan to deliver the baby early via cesarean section and to keep close watch on the size of her aneurysm. Adding to the complexity ...