Skeletal muscle

• Hereditary myopathies are caused by mutations in genes that encode proteins involved in the structure or function of skeletal muscles.
• Joint or articulation


  A place where two bones come together
• Joints


  • Many are movable
  • Some allow only limited movement
  • Others allow no apparent movement
• Structure of a joint

  Directly correlated to its degree of movement
• The skeletal system has many functions in addition to support
• Major functions of the skeletal system

  • Support
  • Protection
  • Movement
• Support


  • Rigid, strong bone is well suited for bearing weight and is the major supporting tissue of the body
  • Cartilage provides firm yet flexible support within certain structures
  • Ligaments are strong bands of fibrous connective tissue that attach to bones and hold them together
• Protection


  • Bone is hard and protects the organs it surrounds
  • The skull encloses and protects the brain
  • The vertebrae surround the spinal cord
  • The rib cage protects the heart, lungs, and other organs of the thorax
• Movement


  • Tendons, strong bands of connective tissue, attach skeletal muscles to bones
  • Contraction of skeletal muscles pulls the tendons, which moves the bones
  • Allows us to move our appendages for normal activities