The lungs

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  • The Lungs
    • Air moves in & out of the lungs
      • The air you breathe in goes through the trachea
      • Passes through the bronchi, then bronchioles and ends up in the alveoli
    • Alveoli carry out gas exchange
      • Surrounded by blood capillaries
      • Blood comes into the lungs through the capillaries containing lots of CO2 and very little O2
        • O2 diffuses out of the air (higher concentration) into the alveolus into the blood (lower concentration)
          • Blood then leaves the lungs and travels around the body
            • CO2 diffuses out of the blood (higher concentration) into the air in the alveolus (lower concentration)
        • CO2 diffuses out of the blood (higher concentration) into the air in the alveolus (lower concentration)
    • Calculate the breathing rate
      • breaths per minute = number of breaths / number of minutes

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