book+1+4.2

IV. Machines in the Human Body A. Living Levers B. Wedges
 * 1) Tendons and muscles pull on bones as levers
 * 2) Joints of the bones acts as fulcrum
 * 3) muscle= input force
 * 4) output force= movement
 * 1) incisors- sharp front teeth

Quiz 4.4
 * 1) lever
 * 2) lifts/pulls the arm
 * 3) it opens the elbow joint
 * 4) wedge
 * 5) jaw/neck muscles
 * 6) tough connective tissue that connects muscles to bones
 * 7) it pulls the bon so you can bend your arm

Study Guide 8. joints 9. incisors