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It was predicted that the healthy and physically active subject would have a higher vital capacity and a lower breathing rate. This is because people who are healthy and physically active have stronger and more powerful lungs. The results proved that this statement is correct. In the lab, it was found that subject 1 had a vital capacity of 3.23 liters and subject 2 had a vital capacity of 2.87 liters. This is significant because it shows that physical activity and being healthy are factors that affect the vital capacity of an individual. My hypothesis also stated that the healthy individual would have a lower breathing rate. This statement was also correct because subject 1 who is the healthy individual has a breathing rate of 19 breaths per minute whereas subject 2 who is the ill individual has a higher breathing rate of 27 breaths per minute. This is because the sick individual has nasal congestions which affect the number of breaths she has to take. Since she is not able to inhale as much volume of air as the healthy individual because her nose is congested. Therefore my hypothesis was correct and these are the factors that affect vital capacity and breathing rate.Studies show that when a subject is conscious of how they are breathing, they tend to think too hard about how to breathe. This may affect the way they breathe. Individuals who are aware of their breathing may breathe more heavily or more controlled. This experimental error may have caused inaccurate measurement of breathing rate and could result in improper data. Another experimental error that possibly could have affected the results is if one subject is more stressed than the other. Although one subject may have been sick, she also could have been stressed with her personal life or school life. When an individual is thinking about stressful thoughts, the heart rate increases and the subject would breath faster. This would affect the breathing rate of the subject and may not have anything to do with being sick. Lastly, another experimental error may have been that the lung volume bag may have already had some air in it before the subject inhaled or exhaled into it. This would have caused improper data collection because they would be measuring air that was already there which would cause the expiratory reserve volume and inspiratory reserve volume to change. The expiratory reserve volume and the inspiratory reserve volume would have been higher than it would have if there was no air in the bag, to begin with. To conclude, these experimental errors include breathing consciousness, being stressed and lastly failure to remove all air out of the lung volume bag. These errors cause unexpected and incorrect results and data collection that occurred during the experiment.

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