Students experiment to explain how reflexes, nerve impulses travel to the brain.

At this site you will learn what muscles are made up of and find out about the different types of muscles in the body. A great illustration of a skeletal muscle is also provided. Available in Spanish.

A thorough discussion of the skeletal muscle, smooth muscle and the cardiac muscle. Muscular diseases are highlighted in this site as well.

Learn what muscles are, how they are classified, and how they are attached to the body's skeletal system. This site contains several definitions, illustrations showing the parts of muscles, and a quiz to test your knowledge of muscles...

In this activity, students participate in a series of timed relay races using their skeletal muscles. The compare the movement of skeletal muscle and relate how engineers help astronauts exercise skeletal muscles in space.

An impressive array of muscle tissue pictures for viewing within the classroom.

This introduction to the muscular system of the body describes the three different types of muscles: smooth, skeletal, and cardiac.

What weighs 3 pounds at maturity and is faster than any computer? If you don't know then use this site about the brain. Get great information and diagrams about the brain. Available in Spanish.

How exactly does the muscular system function? Find out!