Involuntary muscles contract and relax automatically inside your body. We can not control our involuntary muscles. Smooth Striated Striated Voluntary or Involuntary Involuntary Involuntary Voluntary Function Controls movement of internal organs. Controls contractions of the heart . Moves bones .
Skeletal muscles work in pairs.
When one contracts, the other relaxes. They are attached to bone by bands of tissue called tendons. If this page doesn't look right, you need to upgrade to the new version of Flash Player .