Cardiac Muscle – Structure & Comparisons

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Across
  1. 4. Sends impulse from sarcolemma to interior cell
  2. 6. _______reticulum is smaller in cardiac muscle & larger in skeletal muscle
  3. 7. From extracellular fluid
  4. 8. Long refractory periods prevent______
  5. 9. Made of myofilaments arranged in sarcomeres
  6. 10. In cardiac muscle cell & used for energy
Down
  1. 1. Allows quick communication between neighboring cells
  2. 2. _____discs found at junction of different cardiac muscle cells
  3. 3. _____period lasts almost the entire muscle twitch
  4. 5. Compared to skeletal muscles, in cardiac muscles, this branches & joins neighboring cells through intercalated disks