ADAPTATIONS IN RESPIRATORY SYSTEM CROSSWORD!

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Across
  1. 4. What is the term for organisms that can survive in low-oxygen environments using anaerobic respiration?
  2. 6. In high-altitude mammals, what increases to enhance oxygen uptake?
  3. 7. What is the main terrestrial adaptation for oxygen exchange in mammals?
  4. 8. What are the small air sacs in the lungs where gas exchange occurs?
  5. 9. This adaptation in the respiratory system of birds helps control buoyancy.
  6. 10. What do yaks in the Himalayas use to conserve energy while breathing at high altitudes?
Down
  1. 1. What do camels store in their blood and muscles to aid survival in arid environments?
  2. 2. What do fish use to extract oxygen from water?
  3. 3. Which avian adaptation allows for a constant flow of air and oxygen during flight?
  4. 5. What is the name of the network of tiny tubes in insects for oxygen delivery?