muscle anatomy crossword

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Across
  1. 4. defines the boundaries of a muscle sarcomere.
  2. 7. a bundle of structures, such as nerve or muscle fibers or conducting vessels in plants.
  3. 8. A flexible but inelastic cord of strong fibrous collagen tissue attaching a muscle to a bone.
  4. 9. are the filaments of myofibrils, constructed from proteins, principally myosin or actin.
  5. 10. Any of the elongated contractile threads found in striated muscle cells.
  6. 13. are extensions of the cell membrane that penetrate into the center of skeletal and cardiac muscle cells.
  7. 15. The region of a striated muscle fiber that contains only thick (myosin) filaments.
  8. 17. a protein that forms (together with myosin) the contractile filaments of muscle cells, and is also involved in motion in other types of cell.
  9. 18. is the basic contractile unit of muscle fiber.
  10. 20. consist of a single muscle cell. They help to control the physical forces within the body. When grouped together, they can facilitate organized movement of your limbs and tissues.
Down
  1. 1. In striated muscle sarcomere, the M line is the attachment site for the thick filaments.
  2. 2. a sheath of fibrous elastic tissue surrounding a muscle.
  3. 3. a fibrous protein that forms (together with actin) the contractile filaments of muscle cells and is also involved in motion in other types of cells.
  4. 5. is a complex network of specialized smooth endoplasmic reticulum that is important in transmitting the electrical impulse as well as in the storage of calcium ions
  5. 6. the cytoplasm of striated muscle cells.
  6. 7. Is a thin casing of connective tissue that surrounds and holds every organ, blood vessel, bone, nerve fiber and muscle in place.
  7. 11. the sheath of connective tissue surrounding a bundle of muscle fibers.
  8. 12. is the region of a striated muscle sarcomere that contains thin filaments.
  9. 14. the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
  10. 16. It's the muscle, is a wispy layer of areolar connective tissue that ensheaths each individual muscle fiber.
  11. 19. is the region of a striated muscle sarcomere that contains myosin thick filaments.