The spine is an amazing piece of architecture that is often neglected until we get a backache. Learn more about the spine in this video from Discovery Health's "Body Invaders."
WHAT'S INSIDE: HUMAN BODY
- Body Parts
- Body Systems
You touch a hot object and immediately drop it. It happens so quickly you don't even think about it. How does this happen? Your nervous system coordinated everything.
Unfortunately for him, Humpty Dumpty was not blessed with the human skeletal system. Why can your skeleton do what all the king's horses and all the king's men can't?