Lungs: Lung Volumes and Lung Capacity
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Investigation to determine whether or not relationships exist between gender or height with lung capacity of Year 9 students
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INTRODUCTION
The capacity of our lungs is the volume of air our lungs can hold. Our lungs have a greater capacity than we use when we take a normal breath. Scientists use various terms to describe the different components of lung capacity. Tidal
Volume is the amount of air breathed out in a single normal breath (inhalation and exhalation). The Inspiratory Reserve Volume is the amount of air you can inhale over and above a normal breath. The Expiratory Reserve Volume is the volume of air forced out of the lungs after a normal inhale and exhale.
The Vital Capacity is the volume of air that can be forcibly expelled after the deepest inhalation. Finally, the Respiratory Reserve Volume is the amount of air remaining in your lungs after a forced exhalation ( approx.1200ml ).Your
Total Lung Capacity is the sum of your Vital Capacity and the Respiratory
Reserve Volume. In this investigation, we will investigate the various components of lung capacity and calculate our Total Lung Capacity.
Results will vary depending on age, sex, ethnicity and health. Younger students will generally have lower values. During exercise, your tidal volume would be nearer your vital capacity since you are breathing in and out forcefully. The air knocked out is the residual air volume. This volume remains in the lungs unless it is forced out by a severe blow. Normal forced breathing has no effect on it. In lung infections, the vital capacity is decreased due to fluid filling some of the air sacs. In emphysema, the residual air volume is increased and the expiratory reserve volume is decreased since air gets trapped in the damaged air sacs and cannot be forced out. You are breathing in and out forcefully. ( R.Lord Jr 2007 )
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RESEARCH QUESTIONS!
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Research Question 1: Is there a relationship between a person’s
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Investigation to determine whether or not relationships exist between gender or height with lung capacity of Year 9 students
!
!
!
INTRODUCTION
The capacity of our lungs is the volume of air our lungs can hold. Our lungs have a greater capacity than we use when we take a normal breath. Scientists use various terms to describe the different components of lung capacity. Tidal
Volume is the amount of air breathed out in a single normal breath (inhalation and exhalation). The Inspiratory Reserve Volume is the amount of air you can inhale over and above a normal breath. The Expiratory Reserve Volume is the volume of air forced out of the lungs after a normal inhale and exhale.
The Vital Capacity is the volume of air that can be forcibly expelled after the deepest inhalation. Finally, the Respiratory Reserve Volume is the amount of air remaining in your lungs after a forced exhalation ( approx.1200ml ).Your
Total Lung Capacity is the sum of your Vital Capacity and the Respiratory
Reserve Volume. In this investigation, we will investigate the various components of lung capacity and calculate our Total Lung Capacity.
Results will vary depending on age, sex, ethnicity and health. Younger students will generally have lower values. During exercise, your tidal volume would be nearer your vital capacity since you are breathing in and out forcefully. The air knocked out is the residual air volume. This volume remains in the lungs unless it is forced out by a severe blow. Normal forced breathing has no effect on it. In lung infections, the vital capacity is decreased due to fluid filling some of the air sacs. In emphysema, the residual air volume is increased and the expiratory reserve volume is decreased since air gets trapped in the damaged air sacs and cannot be forced out. You are breathing in and out forcefully. ( R.Lord Jr 2007 )
!
RESEARCH QUESTIONS!
!
Research Question 1: Is there a relationship between a person’s