| A | B |
| antagonist | muscle that opposes another |
| fixator | muscle that acts as a joint stabilizer |
| insertion | point of muscle attachment |
| lever | rigid bar free to turn about a fixed point |
| origin | point of attachment that doesn't move |
| posture | alignment of body parts |
| prime mover | muscle that directly performs a given movement |
| synergist | muscle that contracts at the same time as another |
| endomysium | covers the skeletal muscle cells |
| perimysium | bind skeletal muscle fibers |
| epimysium | covers the muscle as a whole |
| aponeurosis | sheet of connective tissue |
| mastication | chewing |
| extrinsic | from the outside |
| intrinsic | from the inside |