heart

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Across
  1. 2. The ________ valve prevents backflow of blood from the left ventricle to the left atrium.
  2. 7. The lower chambers of the heart.
  3. 9. Our main artery which carries oxygenated blood to all parts of the body.
  4. 10. The heart has ________ chambers.
Down
  1. 1. The ________ artery is connected to the right ventricle and carries deoxygenated blood to the lungs.
  2. 3. The _________ prevents backflow of blood from the right ventricle to the right atrium.
  3. 4. The upper chambers of the heart.
  4. 5. A thin muscular wall that separates the right side and left sides of the heart.
  5. 6. Connected to the right atrium and brings deoxygenated blood back from tissues of the body.
  6. 8. The pulmonary vein is connected to the ________ atrium and brings oxygenated blood back from the lungs.