Respiratory System

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Across
  1. 4. Main organs of the respiratory system that allow the inhalation of oxygen and the exhalation of carbon dioxide.
  2. 7. allow air to get from the trachea to the alveoli.
  3. 8. is a strong muscle beneath the lungs. It contracts when breathing.
  4. 9. tube-like structure which connects the nose and mouth to the lungs.
  5. 10. the process of taking in oxygen and releasing carbon dioxide from the body.
Down
  1. 1. gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells.
  2. 2. A gas that is expelled from the body by the respiratory system.
  3. 3. sacs that hold air and allow the air to contact capillaries of the circulatory system.
  4. 5. connect the lungs to the trachea.
  5. 6. the system of the body that brings oxygen into the body and releases carbon dioxide.