Your circulatory or cardiovascular system serves a vital function by delivering oxygen and nutrients to all the organs and tissues of your body. Learn more about how the circulatory system works ...

Open circulatory systems have been portrayed aspoorly designed systems with poor performance characteristics, lacking in adequate tissue perfusion or fine control mechanisms. Recent studies cast doubt ...

Video summary This short film explains how the heart and circulatory system work, taking a close look at the four chambers, two sides, and the valves of the heart. They also show the system of ...

The heart keeps all the blood in your circulatory system flowing. Find out more in this Bitesize Primary KS2 Science guide.