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), ...

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 ...