Muscular System

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Across
  1. 4. Made up of thin actin filaments
  2. 8. Basic contracting unit of skeletal muscle
  3. 10. A key motor protein, particularly important for muscle contraction
  4. 12. Skeletal muscle cells
  5. 16. Muscle cell membrane
  6. 17. The main inspiratory muscles
  7. 18. Bundles of interconnected protein filaments of striated muscles
  8. 19. The attachment site that doesn't move during contraction
Down
  1. 1. A delicate connective tissue layer
  2. 2. A muscle that stabilizes or fixes a part of the body to which a muscle in the process of moving another part is attached
  3. 3. Sites where the ends of motor nerve fibers connect to muscle fibers
  4. 5. A sheet-like, fibrous connective tissue that serves as an attachment point for muscles
  5. 6. Muscles that decrease the thoracic cavity size
  6. 7. The site that undergoes most of the movement when a muscle contracts
  7. 8. Part of skeletal muscle
  8. 9. Muscles that increase the size of the thoracic cavity when they contract
  9. 11. A muscle that helps another muscle perform a particular function effectively
  10. 13. A fibrous connective tissue that attaches muscle to bone
  11. 14. A sheath of fibrous elastic tissue surrounding a muscle
  12. 15. A muscle or muscle group that directly produces a desired movement