Your heart is an exquisitely engineered pump made almost entirely of muscle. And you can see the extraordinary engineering in action if we slow your heart to a single beat. Inside the cavernous ...

This short film offers a look at respiration and a tour around the circulatory system and digestive system in the human body, through blood vessels and into mitochondria. There is a detailed ...

To understand how to solve those challenges, we first must know the risks to human health during space travel ... increased arrhythmias. Although the cardiovascular system functions well in space, the ...