The Muscular system

2. System: System composed of skeletal, smooth, and cardiac muscle tissue that provides movement, posture, and heat.
4. Muscle: Voluntary muscle attached to bones that allows for movement.
6. Muscle: Involuntary muscle tissue found only in the heart that produces rhythmic contractions.
8. The prime mover; the muscle primarily responsible for a specific movement.
9. The shortening or tightening of a muscle fiber.
10. Muscle: Involuntary muscle found in the walls of internal organs (digestive tract, blood vessels).
13. A movement that increases the angle between two bones (straightening a limb).
14. The thin protein filament that acts with myosin to produce contraction.
15. A movement that decreases the angle between two bones (bending a limb).
16. A muscle that opposes or reverses the action of another muscle (agonist

1. Muscles that are under conscious control, such as skeletal muscles.
2. The thick protein filament that works with actin to create muscle movement.
3. The attachment site of a muscle that remains relatively stationary during contraction.
5. The attachment site of a muscle to the bone that moves.
7. Muscles that operate automatically, not under conscious control (e.g., cardiac, smooth).
11. A microscopic fiber found within muscle cells that contains actin and myosin.
12. Fibrous, cord-like connective tissue that attaches muscle to bone.