Respiratory and Circulatory System Puzzle

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 2. Respiratory disorder characterized by wheezing (6)
  2. 4. The passages through which air enters and leaves the body (6)
  3. 7. A mechanical device in a camera that controls size of aperture of the lens (9)
  4. 10. Inflammation of the membranes lining the ___ tubes (10)
  5. 11. A heavy odorless colorless gas formed during respiration and by the decomposition of organic (13)
  6. 12. Any of the smallest ___ ducts (plural) (11)
  7. 14. Expectorated matter (6)
  8. 15. The thin serous membrane around the lungs and inner walls of the chest (6)
  9. 16. Organ that pumps blood around the body (5)

Down

  1. 1. A cartilaginous structure at the top of the trachea (6)
  2. 3. One of the tubules forming the respiratory system of most insects and many arachnids (7)
  3. 5. A sudden noisy expulsion of air from the lungs that clears the air passages (5)
  4. 6. Either of two saclike respiratory organs in the chest of vertebrates (plural) (5)
  5. 8. The metabolic processes whereby certain organisms obtain energy from organic molecules (11)
  6. 9. A ___ in which ___ circulates (plural) (12)
  7. 13. Gas in the air that we need to breathe (6)