| A | B |
| Muscles | bundles of muscle fiber |
| contract | working, pull, become shorter and thicker |
| relax | not working, longer, thinner |
| voluntary | is controled by thought |
| involuntary | works without conscious thought, you cannot control |
| Fibromyalgia | chronic widespread pain in muscles |
| skeletal muscles | attached to bones, movement, voluntary |
| abduction | leg is moved out to the side away from the body |
| extension | lower leg straightened away from upper leg |
| trapezius | TRAPS -upper back and neck |
| tricep | back of upper arm extends lower arm |
| quadricep | QUAD front of thigh extends leg |
| gluteus maximus | buttocks extends thigh |
| muscular dystrophy | inherited atrophy |
| Aduction | moving body part toward midline |
| Abduction | moving body part away from the midline |
| tendon | strong tough, connects muscle to bone |
| elasticity | ability to return to original shape |
| excitability | ability to respond to stimulus |
| extensibility | ability to stretch |
| muscle spasms | sudden painful contractions |
| muscle tone | muscles are partially contracted |
| hamstrings | back of upper leg |
| latissimus dorsi | LATS- mid back |
| deltoid | DELTS - shoulder |
| achilles tendon | back of ankle |
| external oblique | obliques - front, side abdominal |
| rectus abdominus | front abdominal - 6 pack |
| pectoralis major | PECS -chest |