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Medicine LibreTexts

7: Muscles


After completing this section, you should know:

  • The structure of smooth, cardiac and skeletal muscle and where they are found.
  • What the insertion and origin of a muscle is.
  • What flexion and extension of a muscle means.
  • That muscles usually operate as antagonistic pairs.
  • What tendons attach muscles to bones.

Thumbnail: Superficial muscles of the chest, including pectoralis major (Public Domain; Gray's Anatomy).