Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.
A lot lower risk of getting serveral differnt types of cancer to insure she isnt caught cheating and punishment to follow if she was drug tested at work, or at school, to prevent her from going into heavy depression later in life
