SPENCER SUTTON / SCIENCE PHOTO LIBRARY SPENCER SUTTON / SCIENCE PHOTO LIBRARY
Illustration showing the musculature of the front and back of a human female. The muscles shown are skeletal muscles. These muscles are consciously controlled by the brain. They move the body by contracting and relaxing, often in opposing pairs, which pulls tendons (white) attached to the skeleton. They account for just under half the body's weight.
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