PHYSL212 Study Guide - Final Guide: Chordae Tendineae, Tricuspid Valve, Pulmonary Circulation
5 Jan 2019
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Physl 212: cardio final study guide: mixed venous blood passes from the right atrium into the right ventricle through the tricuspid valve. Relate this to the poiseuille"s law/ poiseuille-hagen equation. The left ventricle functions in the systemic pathway which needs to distribute blood to all parts of the body whereas right ventricle is involved in the pulmonary pathway which just involves lungs. Since the systemic pathway"s length is significantly larger than the pulmonary pathway, according to poiseuille"s law, the resistance posed by the systemic circuit is much larger than the pulmonary circuit, because length (l) and resistance (r) are directly proportional. If resistance decreases with constant pressure, blood flow would increase. According to the p-h equation, blood flow is controlled at a local level by changing internal radius of the given organ/capillary"s blood vessel. The systolic pressure is the first heart beat after cutting off blood flow through the brachial artery.
