Heart and Circulatory System Crossword

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Across
  1. 2. this type of circulation carries blood from the heart to all the other parts of the body and back
  2. 5. this type of circulation is a short loop from the heart to the lungs and back
  3. 6. These carry blood away from the heart
  4. 7. the second phase of a heartbeat (heart fills with blood)
  5. 8. these carry blood to the heart
  6. 9. The heart sends ________ throughout our bodies, carrying oxygen to every cell
  7. 12. the sinus node sends out an _____ signal to start contacting the heart muscle
Down
  1. 1. the first phase of a heartbeat (the lub sound)
  2. 3. The heart is a ___________.
  3. 4. Tiny blood vessels that connect very small artery and vein branches
  4. 8. these is veins keep blood flowing in the correct direction
  5. 10. Blood travels in only _____ direction only
  6. 11. the _________ valve separates the left atrium from the left ventricle