Physiology 2130 Lecture Notes - Lecture 10: Lung Volumes, Intrapleural Pressure, External Intercostal Muscles
7 Aug 2017
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Document Summary
5 main roles of respiratory system: transport of oxygen from air into the blood, removal of carbon dioxide from blood into the air, control of blood acidity (ph, temperature regulation, forming a line of defense to airborne particles. Anatomy blood vessels: pulmonary artery deoxygenated blood to lungs, capillaries maximize gas exchange (endothelial walls, large cross-sectional area, low blood. Lungs branch to form network of capillaries around each alveolus (see above) velocity: then blood flows back to heart via. Pressure of the lungs alveolar and atmospheric pressure: pressure inside lungs is alveolar/intrapulmonary pressure (760mmhg, pressure outside body is atmospheric pressure (760mmhg) intrapleural pressure (756mmhg) difference of. 4mmhg: chest wall and lungs moving in opposite, directions causes this lower pressure. Boyles law when volume of a container decreases, pressure inside increases (vice versa) 759mmhg: pressure gradient exists and air flows into lungs contraction of these muscles is an active process and relies in on signals from brainstem.
