Across
- 3. where thick and thin filaments overlap
- 5. the plasma membrane of muscle cells
- 6. is the boundary between sarcomeres
- 10. is a collection of excitable cells.
- 11. thick filament
- 14. consists of the main tissue of the walls of the heart.
- 15. control muscle not undercontrol.
- 17. makes the heartbeat.
- 18. the functional unit of a muscle fiber
- 19. each muscle cell/fiber has smaller fibers within it called
Down
- 1. causes movement.
- 2. inside skeletal muscles, fibers are organized into these bundles called
- 4. found in walls of hollow organs
- 7. each muscle is surrounded by a membrane called
- 8. tendon attached to muscle bone.
- 9. fascicles are surrounded by a membrane called
- 10. a single muscle cell
- 12. muscle under control
- 13. thin filament
- 16. each muscle cell/fiber is surrounded by this.