Circulatory and Respiratory Vocabulary

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Across
  1. 2. Air sacs within the lungs where gases are exchanges between the lungs and the blood.
  2. 4. a tiny blood vessel that connects an artery to a vein and that exchanges substances such as gasses nutrients between the blood and the blood cells
  3. 6. Either upper chamber of the heart
  4. 7. a blood cell that carries oxygen to the cells of the body and carries carbon dioxide from cells back to the lungs
  5. 10. Blood vessels that carry blood toward the heart
  6. 12. a muscular organ that pumps the blood through the body
  7. 13. The body system that takes in oxygen and release carbon dioxide.
Down
  1. 1. the cells of the circulatory system that fight disease by attacking invading microorganisms and making antibodies to fight infection.
  2. 3. The tube that transports air from the throat to the lungs, also called the windpipe.
  3. 5. Either lower chamber of the heart
  4. 8. A pair of tubes that branch off the trachea and enter the lungs.
  5. 9. Main organ of the respiratory system
  6. 11. Blood vessels that carry blood AWAY from the heart.