| Term | Definition |
| extensors | straighten your hand at the wrist |
| triceps | straighten your arm at the elbow |
| trapezius | raises your head and shoulders |
| deltoids | raise your upper arm |
| latissimus dorsi | muscles lower your upper arm |
| gluteus maximus | extends your thigh and raises your torso from a stooping position |
| abductors | move your legs apart and together |
| gastrocnemius | extends or lowers your fott when you walk or tiptoe |
| hamstrings | bend your leg at the knee |
| achilles tendon | attaches your calf muscles to your heel bone |
| sternomastoid | turns your head |
| flexors | bend your hand at the wrist |
| biceps | bend your arm at the elbow |
| pectoralis major | moves your arm across your chest |
| abdominal rectus | flexes your torso |
| external oblliques | assist in breathing |
| quadriceps | straighten and raise your leg |
| sartorius | muscle bends your leg at the knee |
| skeletal muscles | muscles attached to bones that enable you to move |
| smooth muscles | muscles found in organs, blood vessels, and glands including your mouth, stomach and lungs |
| cardiac muscles | muscles found only in the walls of your heart |