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Respiratory System

What changes happen to respiratory system during exercise?


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Answered 2011-10-04 14:14:12

it works harder to draw in as much oxygen as the heart pumps more blood to circulate faster.

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Pulmonary ventilation is 6 liters/minute in resting individual. You have a respiratory rate of 12/minute and tidal volume of 500 ml/minute. During heavy exercise tidal volume increases from 10 % of vital capacity to about 50 % of vital capacity. And respiratory rate increases from 12 to about 40 to 45/ minute. Thus increasing the pulmonary ventilation to about 100 liter/minute.


they get emotional. and moood swings.


Short Term The muscle cells in the body will use up more oxygen and produce more Carbon dioxide. The lungs will have to work harder to provide Oxygen and also remove Carbon dioxide. There will be an increase in breathing rate at the body will be trying hard to get as much oxygen as possible and to minimize the amount of oxygen debt. This will also happen after exercise as well as the body will have to repay the body's oxygen debt. Respiratory RateDuring Rest: 14 per minute During Exercise: 32 per minute Volume per breathe During Rest: 0.4 litres During Exercise: 2.4 litres Minute Volume During Rest: 5.6 litres During Exercise: 76.8 litres Long Term The muscles of the respiratory system such as the diaphragm and the intercostals muscles get stronger. This is so that they can make the chest cavity larger. Having a larger chest cavity means that you can also have a increased Vital capacity. This is because more air is able to be inspired. More capillaries are formed around the alveoli so that more gaseous exchange can take place and so that it is easier for it to happen. Gas exchange will also be able to happen more quickly meaning that exercise can be maintained at a higher intensity for longer.After about a minute of hard (meaning makes you sweat) exercise your body has used all the stored oxygen so the respiratory rate increases. This is working the respiratory system so really the Diaphragm is having to contract and expand faster in order to force more air in and out of the lungs at a faster rate.it makes your lungs have a larger capacity.


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