The cardiovascular system is made up of your heart and your blood vessels. This heart anatomy diagram shows that blood flows from the right atrium into the right ventricle and out to the lungs ...

The Man Who Demystified the Human Heart Pioneering anatomist William Harvey discovered that the organ once thought to be the seat of the soul was actually a simple pump.

Your heart beats about 100,000 times in one day and about 35 million times in a year. During an average lifetime, the human heart will beat more than 2.5 billion times.

Using the plant like scaffolding, scientists built a mini version of a working heart, which may one day aid in tissue regeneration. 0:46 Transforming a Spinach Leaf Into Beating Human Heart Tissue ...