Circulatory System: Science Videos

This series explains how the heart works as a pump. You will learn how pressure and volume change inside the heart with each beat, and what doctors mean by preload, afterload, and contractility. You will also learn how blood flows in a developing baby through the placenta, and what happens in blood clots, stenosis, and heart failure. This is valuable for anyone interested in nursing, medicine, or heart health. It is detailed material. Knowing the basic parts of the heart will help.

Note: All Khan Academy content is available for free at www.khanacademy.org