Do brisk walk in a particular area of school/class and return back to class in 40 seconds along with few other students. Stand in front of the class. You will notice that all of you are breathing very fast. Now answer the following questions.
A. Why are students breathing fast?
B. Why breathing fast helps you to run?
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Explanation:
A. During the run, the energy demand is high, but the oxygen supply to produce energy is limited. Therefore, anaerobic respiration takes places in the muscle cells to fulfil the energy demand. After finishing the race, an athlete breathes faster and deeper than usual to supply more oxygen to the cells.
B. Inhaling and exhaling through your mouth allows more oxygen to enter your body and fuel your muscles.
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