Biology 2601A/B Lecture Notes - Lecture 19: Mass Flow, Pulmonary Vein, Coronary Circulation
10 Dec 2018
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The speed of diffusion is sufficient to supply oxygen to 1 mm. Capillaries are thin because this is where diffusion dominates and they have fenestrations that let fluid leak out. Independently involve complete separation between systemic circulation and pulmonary circulation. Deoxygenated blood is coming from body, fills right ventricle (filling is passive) when atria contract it tops off the blood and stretches the ventricle: valves prevent backflow. Pulmonary loop: left side is stronger, much bigger. Arteries = vessels that carry blood away from the heart. = pulmonary veins carry oxygenated blood from the lungs to the left atrium. Right side of the heart just has to pump blood from the lungs and back but the other problem we have with high pressure on the right side is that it increases fluid leaked out into the alveoli. The lungs tend to fill with fluid = pulmonary edema (edema = when you have fluid accumulation in your tissues)
