| A | B |
|---|
| Rectus | Fascicles parallel to midline |
| Transverse | Fascicles perpendicular to midline |
| Oblique | Fascicles diagonal to midline |
| Maximus | Largest |
| Minimus | Smallest |
| Longus | Longest |
| Brevis | Shortest |
| Latissimus | Widest |
| Longissimus | Longest |
| Magnus | Large |
| Major | Larger |
| Minor | Smaller |
| Vastus | Huge |
| Deltoid | Triangular |
| Trapezuis | Trapezoid (shape) |
| Serratus | Saw-toothed |
| Orbicularis | Circular |
| Platys | Flat |
| Flexor | Decreases a joint angle |
| Extensor | Increases a joint angle |
| Abductor | Moves a bone away from the midline |
| Adductor | Moves a bone toward the midline |
| Levator | Raises a body part |
| Depressor | Lowers a body part |
| Sphincter | Decreases the size of an opening |
| Biceps | Two origins (two heads) |
| Triceps | Three origins (three heads) |
| Quadriceps | Four origins (four heads) |
| By location--cervicis | Of the neck |
| By location--carpi | Of the wrist |
| By location--abdominis | Of the abdomen |
| By location--brachii | Of the arm |
| By location--superficialis | Superficial |
| Fleshy part of a muscle that contains actual muscle tissue | Belly |
| Structure that attaches muscle to bone | Tendon |
| Attachment to the more movable bone | Insertion |
| Attachment to the less movable bone | Origin |
| Rigid rod | Lever |
| Levers in the body | Bones |
| Fixed point on which a lever moves | Fulcrum |
| Fulcrums in the body | Joints |
| Force that causes movement | Effort |
| Force that opposes movement | Resistance or load |
| Effort in the body | Muscle contraction |
| Resistance in the body | Weight of the body part to be moved |
| Muscle that is currently performing the desired action | Agonist or prime mover |
| Muscle that must stretch to allow movement to occur | Antagonist |
| Bundles of muscle fibers | Fascicles |
| By location--profundus | Deep |
