Muscular System

4. tissue composed of fibers that can contract, causing movement of an organ or part of the body
13. Respiration that requires oxygen
14. Muscles that work in cooperation with the prime mover to stabilize movement
16. muscle that opposes or reverses a prime mover
17. Connective tissue surrounding a fascicle
19. The muscle with the major responsibility for a certain movement
20. long slender skeletal muscle cells
22. Thin filament of protein found in muscles
23. Involuntary muscle found inside many internal organs of the body
24. thicker, middle region of muscle between origin and insertion
25. contractile organelles found in the cytoplasm of muscle cells; made of actin & myosin myofilaments

1. Connects muscle to bone
2. A dark thin protein band to which actin filaments are attached in a striated muscle fiber, marking the boundaries between adjacent sarcomeres.
3. The contractile proteins, actin and myosin, of muscle cells
5. Contractile unit of muscle
6. Involuntary muscle tissue found only in the heart.
7. The contractile protein that makes up the thick filaments of muscle fibers
8. The attachment of a muscle tendon to a moveable bone or the end opposite the origin
9. bundle of muscle fibers surrounded by perimysium
10. a sheath of fibrous elastic tissue surrounding an entire muscle.
11. attachment of a muscle that remains relatively fixed during muscular contraction
12. main energy source that cells use for most of their work
15. A muscle that is attached to the bones of the skeleton and provides the force that moves the bones.
18. middle of sarcomere, where myosin is anchored
21. connective tissue that surrounds individual muscle fibers