The circulatory system, also known as the cardiovascular system, ... (the flow of blood to the heart is blocked), hypertension (high blood pressure causing the heart to work harder), ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The circulatory system consists of three independent systems that work together: the heart ...

A medical science project from Science Buddies. Learn how our bodies move blood best by building a model of the body's circulatory system--in sickness and in health.

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 ...

How Your Heart Works: Heart and Circulatory System, Explained Medically reviewed by Stacy Sampson, D.O. — Written by The Healthline Editorial Team — Updated on September 21, 2018 Heart chambers ...