Describe gas exchange in the human body from inspiration (breathing in) to expiration (breathing out). How...

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Medical Sciences

Describe gas exchange in the human body from inspiration(breathing in) to expiration (breathing out). How does oxygen andcarbon dioxide travel throughout the body? Provide specific detailsof how, where, and why these gasses travel. Your details shouldalso include the lungs, heart, blood vessels, and muscle tissues.Use concepts learned in class and key terms to ensure you have adetailed response.

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Diffusion of Oxygen from AtmosphericAir into AlveoliPartial pressure of oxygen in the atmospheric air is 159mm Hg and in the alveoli it is 104 mm Hg Because of the pressuregradient of 55 mm Hg oxygen easily entersfrom atmospheric air into the alveoli Diffusion of Oxygen from Alveoli into Blood When blood passes through pulmonary capillary RBC isexposed to oxygen only for 075 second at rest and onlyfor 025 second during severe exercise So diffusion ofoxygen must be quicker and effective Fortunately thisis possible because of pressure gradientPartial pressure of oxygen in the pulmonary capillary is 40 mm Hgand in the alveoli it is 104 mm HgPressure gradient is 64 mm Hg It facilitates the diffusionof oxygen from alveoli into the blood Oxygen is transported from alveoli to the tissue byblood in two forms1 As simple physical solution2 In combination with hemoglobinOxygen combines with hemoglobin in blood and istransported as oxyhemoglobin Transport of oxygenin this form is important because maximum amount97 of oxygen is transported by this See Answer

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