PHYSL212 Lecture Notes - Lecture 28: Tricuspid Valve, Pulmonary Vein, Pulmonary Artery

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Physl 212 - lecture #28 - internal organization of the cardiovascular system. Need to know all the red boxes!! Fundamentals of cardiology: electrical events precedes mechanical events, there is no air at any given time in the heart, atria don"t contract at the same time as ventricles. Papillary muscles contract before ventricular muscles contract: this is to prevent backflow. Increases the pressure so the leaflets don"t go in the wrong direction and. End diastolic volume: when the ventricles fill up. End systolic volume: when there is some blood left over in ventricles after contraction: why does end systolic volume exists? (why don"t we empty completely?) You can get an immediate increase in blood volume or blood pressure when we need it. Get that increase in stroke volume when you suddenly change activities: figure is a right. Pulmonary vs systemic circulation: deoxygenated blood: 75% of the hemoglobin is still saturated with oxygen.

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