Explain The Physiological Changes That Occur In The Respiratory System

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Explain the physiological changes that occur in the cardiovascular and respiratory systems in response to exercise.

One of the main physiological changes that occur within the cardiovascular system in response to exercise is heart rate. When engaging in exercise, the amount of energy required increases instantaneously within the skeletal muscles. This sudden demand creates increasing stress on the cardio-respiratory system to remove the waste products and carbon dioxide from the cells and provide more oxygen for the working cells. This surge of extra energy that is needed requires the heart to pump faster and harder in order to increase the volume of blood being pumped there is an increase in beats per minute.

A redistribution of blood can be given out to supply the areas with a higher demand for oxygen and away from the
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Higher levels of carbon dioxide in the body stimulates an increase in breathing rate and depth. When anticipating the act of exercise heart rate slightly elevates before exercise, this is the same for breathing rate. Once the act of exercise is actually taking place signals are sent to the brain from receptors within the muscles and joints to increase breathing rate. An increase in breathing rate enable a larger volume of air to be taken in and out of the lungs enhancing gaseous exchange.

At the onset of exercise the muscles involved in the expansion of the thoracic cavity; like the diaphragm and intercostal muscles, work harder to increase the expansion of the cavity further consequently inhaling a larger volume of air.

People who train regular develop adoptions to their cardio-respiratory systems. Within the cardiovascular system the size of the heart increases in mass and volume with the left ventricle adapting the most. The regular activity of exercise means that the heart regular has to work at a higher level resulting in the enlarging of the

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