Heart

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Across
  1. 1. Ensure one-way blood flow
  2. 6. Receives oxygenated blood from the lungs
  3. 8. Pumps deoxygenated blood to the lungs
  4. 10. These branches rapidly distribute the electrical signal throughout the right and left ventricles, stimulating them to contract and pump blood to the lungs and the rest of the body
Down
  1. 2. Pumps oxygenated blood to the entire body
  2. 3. The electrical impulse spreads across the atria, causing them to contract and pump blood into the ventricles
  3. 4. Located in the right atrium, this is the heart's natural pacemaker, initiating each electrical impulse
  4. 5. After passing through the AV node, the impulse continues down the bundle of His, a group of specialized fibers
  5. 7. Collects deoxygenated blood from the body
  6. 9. Situated between the atria and ventricles, the AV node momentarily delays the impulse, allowing the atria to finish contracting and empty their blood into the ventricles