Heart Crossword Puzzle

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Across
  1. 2. Vessels that carry blood throughout the body.
  2. 4. Prevents the backwards flow of blood. Act as "doors" and are located at the end of each ventricle.
  3. 5. Vessels that carry oxygen-rich blood to your entire body.
  4. 6. A certain type of muscle tissue that makes up the structure of the heart.
  5. 7. The main artery of the body, supplying oxygenated blood to the circulatory system.
  6. 8. The heart's natural rhythm generator, can be mechanical if the natural one is too weak.
  7. 9. Two upper cavities of the heart, Responsible for passing blood to the ventricles.
  8. 10. The wall of tissue dividing the right and left sides of the heart.
Down
  1. 1. Two lower cavities of the heart, Responsible for pumping blood out of the heart.
  2. 3. A large vein that supplies the heart with deoxygenated blood. There are two located in humans, one for lower body and another for upper body.
  3. 6. Miniature blood vessels that supply the body with blood, nutrients and oxygen.