Chapter 9: Muscular System

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Across
  1. 2. the nerve cell that stimulates the muscle cell
  2. 4. this is a thick and dark protein
  3. 6. this is a network of membranous channels that surrounds each myofibril
  4. 8. has to do with the muscle having the ability to shorten
  5. 10. Has to do with the muscle being able to return to its resting position
  6. 11. this is a thin and light colored protein
  7. 12. a reticular fibers that helps bind together neighboring muscle fibers
  8. 13. this is filled with extracellular fluid and extends deep into the muscle cell
  9. 15. Flexes, rotates, and abducts arm
  10. 16. thin filaments attach to these structures in smooth muscle fibres
  11. 17. this muscle is the muscles that assists the agonist
Down
  1. 1. this is a chemical substance that is released from a motor ending
  2. 3. flexes elbow
  3. 5. Allow heart cells to connect with each other and work as one unit
  4. 6. this muscle is found in a lot of internal organs and blood vessels
  5. 7. not made of fibers and only found in the heart
  6. 9. this is the primary muscle that is responsible for a movement
  7. 14. this is a layer of tissue that is irregular and covers the whole skeletal system