Space technology gets applied in all sorts of ways down here on Earth, making us more comfortable, healthier, and even saving lives!

For most of history, scientists weren't quite sure why our hearts were beating or even what purpose they served. Eventually, we realized that these thumping organs serve the vital task of pumping clean blood throughout the body. But how?...

This is an educational video that explains the structure and function of the heart and blood vessels in the human body, as part of the circulatory system. The video provides detailed explanations of the chambers, valves, and blood...

This video program explores the role of the body's circulatory and respiratory systems, emphasizing things we can do to maintain these important systems. Regular exercise, healthy eating habits, and not smoking are just a few of the...