| A | B |
|---|
| Lever | a rigid bar that moves on a fixed point |
| Fulcrum | point that the lever moves |
| Effort | the froce to move the load |
| Load | the resistance to the effort |
| Mechanical advantage | load is close to the fulcrum |
| mechanical Disadvantage | force is close to the fulcrum |
| Scissors | Example of a 1st class lever |
| Wheelbarrow | Example of a 2nd class lever |
| Forceps | Example of a 3rd class lever |
| Fascicles | Pattern of muscles |
| Prime mover | leads the movement |
| Antagonist | does the opposite of the prime mover |
| Synergists | aids the prime mover |
| Fixator | stabalizes joints and muscles |
| Frontalis | wrinkles forehead |
| Orbicularis oris | muscle around the mouth |
| Orbicularis oculi | muscle around the eye |
| Deltoids | muscle shaped like a triangle |
| Rhomboids | muscle shaped like a parallelogram |
