The science guy explains how the circulatory system works to pump blood through the human body. Combines animated graphics and microscopic footage to explore the anatomy and functions of the heart, valves, blood cells and blood vessels. Presents a variety of examples to illustrate how the cardiovascular system works to circulate blood through the veins. Also discusses the importance of exercise for overall health.

Award-winning series explores the world of science and nature using humor, music, experiments, and interviews with scientists. DVD features fully indexed chapters correlated to National Science Standards, downloadable teacher's guide, interactive glossary and quiz, Internet links, and bonus materials.

1. Big idea -- 2. Try this : pulsometer -- 3. Big demo : heart pump -- 4. Music video.