The Respiratory System and Ventilation

  • Created by: 13mlilli
  • Created on: 21-02-18 20:25
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  • Respiratory system + Ventilation
    • Lungs are in the thorax
      • Separated from from lower body by diaphragm
      • Lungs surrounded by pleural membranes
    • Breathing in...
      • 1) Intercostal muscles + diaphragm contract
      • 2) Thorax volume increases
      • 3) Pressure decreases and air enters
    • Breathing out...
      • 1) Intercostal muscles + diaphragm relax
      • 2) Thorax volume decreases
      • 3) Pressure increases and air goes out
    • Exercise increases breathing rate
      • Experiment
        • 1) Sit still for 5 mins + count no. of breaths in 1 min
        • 2) 4 mins of exercise + count no. of breaths for 1 min
        • 3) Repeat for 2 other ppl. + compare
      • Muscles respire more so need more O2 + more CO2 removed

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