10.7 Crossword Puzzle Amanda Erickson

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Across
  1. 6. This is used to record electrical changes in the heart muscle as it beats
  2. 7. The middle layer of the heart wall
  3. 8. The largest blood vessels that carry blood away from the heart
  4. 11. The smallest type of blood vessels that are only one cell thick
  5. 12. These arteries take blood to the head and neck
  6. 13. The fibrous sac surrounding the heart
  7. 14. The walls of the heart between the chambers are called this
Down
  1. 1. These are the only veins in the body that carry oxygen rich blood back to the heart (2 words)
  2. 2. Blood pressure is measured with this device
  3. 3. The upper chambers of the heart
  4. 4. This is responsible for initiating the beat of the heart (2 words)
  5. 5. The lower chambers of the heart
  6. 9. These blood vessels have thinner walls than arteries and carry blood toward the heart
  7. 10. The smooth layer of cells that line the interior of the heart