The Heart: Science Videos

This series explains how the heart keeps its rhythm and pumps blood. You will learn how electrical signals travel through the heart, how pacemaker cells set the beat, and how the nervous system speeds it up or slows it down. You will also learn how heart muscle stretches and contracts, and what it takes to get a heart transplant. This is great for anyone curious about the heart or interested in health careers. It is detailed material. Some basic biology will help.

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