Heart and Lungs

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Across
  1. 4. The process by which oxygen is taken into the body and carbon dioxide is expelled
  2. 9. Smallest blood vessels where gas exchange occurs
  3. 10. The phase of the heartbeat when the heart muscle contracts and pumps blood
  4. 12. The vessel that carries deoxygenated blood from the heart to the lungs
  5. 13. Tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged
  6. 14. Atrium The chamber of the heart that receives oxygenated blood from the lungs
Down
  1. 1. Ventricle The part of the heart that pumps oxygenated blood into the aorta
  2. 2. Valve The valve located between the right atrium and the right ventricle
  3. 3. Main organ responsible for pumping blood throughout the body
  4. 5. The phase of the heartbeat when the heart muscle relaxes and fills with blood
  5. 6. Muscle that separates the chest cavity from the abdomen, aiding in breathing
  6. 7. The colourless fluid that carries white blood cells and removes toxins from the blood
  7. 8. Blood vessels that carry blood back to the heart
  8. 11. The windpipe, which carries air to the lungs
  9. 13. The large artery that carries blood from the heart to the rest of the body