Lecture 8 - B io 2A03 L8 Lecture 8 Ci rculation I I...

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Lecture 8 – Circulation I I Systemic vs. Pulmonary Pressures P = MAP – CVP 1. Systemic = 90 mmHg; pulmonary – 15 mmHg 2. Recall : that Q = 5L/min for each circuit 3. And : Q = P / R 4. Therefore : R must be lower in the pulmonary circuit. 5. Graph shows different pressures moving from heart to veins 6. Q – directly proportional to P and inversely prop. To R Pulmonary Systemic Low pressure , low resistance circuit High pressure; high resistance circuit 1) Prevents fluid filtration in lungs (doesn’t push fluid into lungs) 2) Prevents shunting of blood 3) Minimizes workload by right ventricle 1) Ensure good fluid filtration in systemic capillaries (want to have bulk flow of fluid from blood to interstitial fluid 2) Rapid shunting ( rapidly diverting blood to areas that need the blood) 3) Left ventricle has high workload 1. Shunting – bypassing a regular circuit 1. Wall of right ventricle much thinner than left (right ventricle pumps blood to lungs)
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This note was uploaded on 03/26/2011 for the course BIOLOGY 2a03 taught by Professor Nurse during the Spring '10 term at McMaster University.

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Lecture 8 - B io 2A03 L8 Lecture 8 Ci rculation I I...

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