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National 4 Science

National 4 Science. Human Health Physiological measurements of lungs Tidal volume and Peak Flow. Tidal volume and peak flow. What is tidal volume? What factors affect tidal volume? How is tidal volume measured? What is peak flow? How is peak flow measured?

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National 4 Science

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  1. National 4 Science Human Health Physiological measurements of lungs Tidal volume and Peak Flow

  2. Tidal volume and peak flow • What is tidal volume? • What factors affect tidal volume? • How is tidal volume measured? • What is peak flow? • How is peak flow measured? • What is peak flow used to indicate?

  3. What is tidal volume? • Tidal volume is the volume of air breathed in OR out of the lungs in one normal breath

  4. Questions • Are the lungs ever empty? • What evidence is there form the graph to support your answer? • Collect cut out • Answer the following: • 1. What is the persons vital capacity? • 2. What is the persons tidal volume? • 3. What is the persons residual volume?

  5. What is peak flow? • Peak flow is the maximum rate at which air can be forced out of the lungs

  6. How is peak flow measured? • Peak flow is measured using a peak flow meter

  7. Measure your peak flow • Make sure the pointer is at ‘0’ • Take in a deep breath • Blow into the mouthpiece as hard and as fast as you can • Take the reading and record in the table • Repeat the process another two times • Your peak flow is the highest reading you take

  8. Peak flow table

  9. What is peak flow used to detect? • Peak flow is used to diagnose asthma • People with asthma have a significantly lower peak flow reading than the average person • People with asthma or other lung conditions have narrower airways therefore have difficulty breathing • Asthma sufferers use inhalers to control their condition

  10. Questions • What is tidal volume? • What factors affect tidal volume? • How is tidal volume measured? • What is peak flow? • How is peak flow measured? • What is peak flow used to indicate?

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