how does our skeleton system make ua move different joints

Question: how does our skeleton system make ua move different joints
- Keywords:
  bone,
  joint,
  movement,
  skeletal system
Asked by blooma1 to Theresia on 17 Nov 2014.
- Theresia Mina answered on 17 Nov 2014:
  
  It is actually the other way round. the joints connect the skeleton, and the force of the movement is created by muscles. For instance, when biceps are contracted it becomes shorter and then this pulls your joints towards your body and then this force moves your bones…

Question: how does our skeleton system make ua move different joints