Pig Respiratory System

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Across
  1. 1. external organ responsible for breathing and smell.
  2. 4. The windpipe, a tube that connects the throat to the lungs
  3. 5. organs where oxygen is absorbed and carbon dioxide is expelled.
  4. 7. The act of breathing in air.
  5. 8. The gas that is exhaled by the pig after oxygen is absorbed.
Down
  1. 2. The act of breathing out air, releasing carbon dioxide.
  2. 3. The gas that is inhaled by the respiratory system and used by cells.
  3. 6. A muscle that separates the chest and abdominal cavities and helps with breathing.