Back to Muscles of the Human Body

- Skeletal muscle or "voluntary muscle" is connected by tendons to bone and is used to effect skeletal movement and in order to maintain your posture. The overall weight of an average adult male is made up of 40–50% of skeletal muscle and an average adult female is made up of 30–40%. These muscles need to be activated consciously.
- Smooth muscle or "involuntary muscle" is found within the walls of organs. Unlike skeletal muscle, smooth muscle is not under conscious control.
- Cardiac muscle is also an "involuntary muscle" but is more like the structure of the skeletal muscle. Cardiac muscle is found only in the heart.

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