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Medicine LibreTexts

7.3: Smooth Muscle

There are three different kinds of muscle tissue: smooth muscle in the walls of the gut and blood vessels; cardiac muscle in the heart and skeletal muscle attached to the skeleton.

  • Tendons attach skeletal muscles to the skeleton.
  • Ligaments link bones together at a joint.
  • Skeletal muscles work in pairs known as antagonistic pairs. As one contracts the other in thepair relaxes.
  • Flexion is the movement that reduces the angle of a joint. Extension increases the angle of a joint.


  • Ruth Lawson (Otago Polytechnic; Dunedin, New Zealand)