Human muscle system | Functions, Diagram, & Facts | Britannica
Human muscle system, the muscles of the human body that work the skeletal system, that are under voluntary control, and that are concerned with movement, posture, and balance. Broadly considered, human muscle—like the muscles of all vertebrates—is often divided into striated muscle, smooth muscle, and cardiac muscle.

Muscles of the Body: Types, Groups, Anatomy & Functions
You have more than 600 muscles that help you do everything from move your body to breathe and stay alive. Learn how to keep your muscles healthy.

MuscleWiki - Interactive Muscle Map & Exercise Library
Click any muscle on our interactive body map to discover targeted exercises. 2000+ free exercise videos with proper form instructions.

Interactive Guide to the Muscular System | Innerbody
Explore the muscular system with Innerbody's interactive 3D anatomy models including the muscles of the arms, legs, chest, back, and more.

Human Muscle Anatomy: All Major Muscle Groups & their Functions
Explore human muscle anatomy in detail, including functions, major muscle groups & how muscles support movement, strength & body stability.

Muscular system - Wikipedia
The muscular system is an organ system consisting of skeletal, smooth, and cardiac muscle. It permits movement of the body, maintains posture, and circulates blood throughout the body. [1] The muscular systems in vertebrates are controlled through the nervous system although some muscles (such as the cardiac muscle) can be completely autonomous. Together with the skeletal system in the human ...

Free Anatomy Quiz - The Muscular System Section
Free multiple-choice quizzes on the muscular system of the human body, including the locations and actions of all the main muscles of the head and neck, the torso, and the upper and lower limbs. Plus there are links to lots of other great anatomy and physiology quizzes and other resources; all free!

Muscle | Systems, Types, Tissue, & Facts | Britannica
Muscle, contractile tissue found in animals, the function of which is to produce motion. Muscle cells fuel their action by converting chemical energy in the form of adenosine triphosphate (ATP), which is derived from the metabolism of food, into mechanical energy.

What Is the Muscular System and How Does It Work?
Learn how your muscles work, from contraction mechanics to fiber types, and why muscle health matters well beyond just physical movement.

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