Air and the Respiratory System

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Across
  1. 4. An organ of the respiratory system (found on your head)
  2. 5. The _______ in the nostrils help to remove the dirt and dust that is in the air.
  3. 7. The tiny openings found on the leaves of plants are known as ___________.
  4. 8. The oxygen in the water is absorbed into the blood in the gills and transported to __________ parts of the fish.
  5. 9. When oxygen in the inhaled air reaches the lungs, it is _________ into the blood and transported to all parts of the body.
  6. 10. Living things on land and in water need _______ to stay alive.
  7. 11. The process by which air enters and leaves our bodies is known as ___________.
  8. 13. Water containing __________ oxygen enters a fish through its mouth and then passes through its gills.
  9. 14. An organ of the respiratory system found in the ribcage
Down
  1. 1. An organ of the respiratory system connecting the nose to the lungs
  2. 2. ____________ is given out by living things when they carry out their daily activities.
  3. 3. Carbon dioxide is taken in by plants to make food in the presence of light during ____________.
  4. 6. Our breathing ________ is the number of times we breathe in one minute
  5. 12. Fish take in oxygen in water using their _______.