The Heart

123456789101112131415
Across
  1. 4. After the lungs fill blood with oxygen, the pulmonary veins carry the blood to the left atrium.
  2. 9. Opens when blood flows out of your left ventricle to your aorta (artery that carries oxygen-rich blood to your body).
  3. 10. The left ventricle is slightly larger than the right. It pumps oxygen-rich blood to the rest of your body.
  4. 12. Protective outer layer.
  5. 15. Inner layer.
Down
  1. 1. Muscular middle layer.
  2. 2. Opens when blood flows from your right ventricle to your pulmonary arteries (the only arteries that carry oxygen-poor blood to your lungs).
  3. 3. small blood vessels where your body exchanges oxygen-rich and oxygen-poor blood.
  4. 5. Door between your left atrium and left ventricle.
  5. 6. The lower right chamber pumps the oxygen-poor blood to your lungs through the pulmonary artery.
  6. 7. Two large veins deliver oxygen-poor blood to your right atrium.
  7. 8. carry oxygen-poor blood back to your heart.
  8. 11. The lower right chamber pumps the oxygen-poor blood to your lungs through the pulmonary artery.
  9. 13. valve, Door between your right atrium and right ventricle.
  10. 14. carry oxygen-rich blood from your heart to your body’s tissues. The exception is your pulmonary arteries, which go to your lungs.