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National 4 Science. Human Health Physiological measurements of the lungs. Physiological Measurements of the Lungs. What three physiological measurements are used to determine the health of the lungs? What is vital capacity? How is vital capacity measured?
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National 4 Science Human Health Physiological measurements of the lungs
Physiological Measurements of the Lungs • What three physiological measurements are used to determine the health of the lungs? • What is vital capacity? • How is vital capacity measured? • What does it indicate about the lungs?
What physiological measurements can be used to determine the health of the lungs? • Three physiological measurements that can be used to indicate the health of the lungs are: • Vital capacity • Tidal volume • Peak flow
What is Vital Capacity? • Vital capacity is the maximum volume of air that a person can breathe out after they have taken in as deep a breath as possible
What factors affect vital capacity? • The following factors affect vital capacity: • Body size: the larger the person’s build the greater their vital capacity • Age: reaches its max around age 20 • Gender: on average women have a lower vital capacity than men • Fitness: as fitness increases vital capacity increases
How is vital capacity measured – low tech? • Take in as deep a breath as possible, breathe out and measure the volume of displaced water
How is vital capacity measured – high tech? • Take in a deep breath • Blow into the mouth piece • Take the reading • Match to the index card
Questions • Intermediate 1 Biology textbook • p58 – 59 • Questions 4 and 5