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The Movers of the Body

Muscles Move You

The Three Kinds of Muscle

How Muscles Move You: The Pulling Pair

Explore the Muscles in 3D

Quick Check: How Muscles Work

Discover the muscular system in interactive 3D — the three muscle types, how muscles pull in pairs, and a hands-on 3D explorer of the major muscle groups with a scored quiz.

More than 600 muscles pull on your bones to move you — and never push. In this module you'll meet the three kinds of muscle, learn how they work in pairs, and explore the major muscle groups on an interactive 3D figure.

The Muscular System

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