The effect of exercise on gas exchange and breathing
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Practical Four The effect of exercise on gas exchange and breathing Authors Greg Deane, Mike Doree, Emily Gibbs, Holly Franklin, Leah Frisby, Rhian Jones, Emma Kirk, Charlotte Hall Aim * To investigate the gas composition air expired at rest and during exercise. * To find out how moderate exercise for 3 minutes affects the percentages of oxygen and carbon dioxide in expired air, tidal volume, respiratory rate and respiratory minute volume. Introduction The respiratory system can be divided into to sections: the upper and lower respiratory system. The upper respiratory system consists of the nasal and oral cavities and the pharynx. The upper respiratory system warms and moistens the air before it reaches the lungs. The lower respiratory system consists of the trachea, the lungs and the diaphragm. The trachea, bronchi and bronchioles are the conducting zone and do not have a gas exchange role. The alveoli are the respiratory zone and gas exchange solely occurs here....

