PHYL 2044 Lecture Notes - Lecture 3: Partial Pressure, Respiratory Tract, Gas Laws
25 Jan 2019
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Phyl 2044: lecture 3 gas exchange and blood gas transport. Overview o2 and co2 transport in blood: pulmonary gas exchange = diffusion of o2 from alveolar air into pulmonary blood (capillaries) Fresh oxygen is taken in from the alveoli to the pulmonary capillaries. Recall: in order for respiration to work, ventilation and perfusion need to work together. There is no point for fresh air to be brought in, if the areas don"t have any capillaries. The mechanisms by which the body transports oxygen and co2 in the blood differ for each gas. A fundamental law that describes the nature in which gases work, similar to when we talked about expanding the lung, changing the pressure and volume. If we increase the volume, we decrease the pressure, which sets up the gradient by which air flows into the lungs: dalton"s law of partial pressures: The pressure of each individual gas is the partial pressure, p.
