blood flows into the heart from a vein, goes into an atrium, then a ventricle, and out through an artery. The valves prevent the blood flowing backwards. The heart is relaxed and blood flows into ...

But what does circulation actually look like? Time for some virtual biology! Welcome to the heart. The heart is a muscle which pumps blood non-stop through a huge network of blood vessels ...

The newly oxygen-rich blood (shown in red) returns to the heart and enters the left atrium. Blood flows through the left atrium into the left ventricle. The left ventricle pumps the oxygen-rich ...

Cut the pericardium to expose the heart. Cut through the coracoid bar and pull back to fully open the pericardial ... Think carefully about relation between circulation and oxygenation of blood in the ...

Physician-scientists found that a subset of artificial heart patients can regenerate heart muscle, which may open the door to new ways to treat and perhaps someday cure heart failure.

They could be signs of poor blood circulation – which can cause serious heart and health problems ... blood vessels make it ...