Bill Nye explores how the body's muscular system works. The science guy examines the human skeleton, using graphics to illustrate how bones, muscles, and joints function together allowing body movement. Features an experiment that reveals the mineral content of bones and discusses the importance of calcium for bone strength. Also demonstrates how X-rays are used to detect broken bones and other injuries.

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 : bones have minerals -- 3. Way cool scientist : foot pressure distribution -- 4. Big demo : bone strength -- 5. Music video.