PHGY 210 Lecture Notes - Lecture 6: Macrophage, Accessory Muscle, Alveolar Cells
4 Feb 2019
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We need to bring air, rich in oxygen, into the lungs and simultaneously get rid of the co2 that is produced by the oxidative processes of the body. Both gases are transported by the blood. Therefore, we need both the respiratory system and the cardiovascular system for gas exchange. The respiratory tract: we breathe in from the nose or mouth air goes in through the nasal turbinates (if you breathe through nose). These capture some of the dust/foreign particles in the air -> air goes through pharynx -> larynx -> trachea -> right and left main bronchi (bronchus = singular) Right main bronchus branches off into three small bronchi because on the right hand side we have three lobes in our right lung. Pleural space: pleural space is small space that contains just a small amount of fluid and nothing else, think of the pleura as a fluid filled balloon to which you would push a fist.
