1. My vital capacity is 3.15 liters. My vital capacity is above the average for females. My vital capacity is in the middle of all the ranges in the class because the lowest is 1.6 liters and the highest is 5 liters. I think my vital capacity is what it is because I have been dancing since I was three and I believe cardiovascular activites and running has also helped. I believe the lowest capacities are what they are because those people might not play instruments or exercise. I believe the higher vital capacities are what they are because those people are probably extremely physically active or plays instruments.
2. In a usual breathe there is about 500mL. Males can exhale 4L and females can exhale 2L. Our breaths are the way they are because females have a smaller build than males and therefore have smaller lungs. I also feel a females diaphragm is smaller causing her to inhale/exhale less air.
3. The mechanism of exhaling forcefully differs from the usual exhalation because when we are breathing it is automatic and we do not think about it. We also just expand our diaphragm a little/as much as our body currently needs. We control exhaling forcefully and we push our lungs to hold more air. We make our muscles expand to release air voluntarily.
Practicing at this via exercise/instrument playing/singing makes you better at it because you are making your lungs work harder and as a result they become stronger and have the capability of holding more air. We also take large and longer breaths while doing these activities which help strengthen our breathing abilities.
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