BPK 142 Lecture Notes - Lecture 13: Premature Ventricular Contraction, Ventricular Tachycardia, Ventricular Fibrillation

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Composed of the heart, blood vessels, and blood. Transport essential materials (oxygen, fuel, molecules, hormones, etc. ) throughout the body to cells where they are needed and to collect waste materials (carbon dioxide, lactic acid, urea, etc. ) generated by the body"s metabolic activity. Pulmonary circuit: blood vessels going to and from the lungs. Systemic circuit: blood vessels going to and from the rest of the tissues of the body. Heart: four chambered muscular pump which propels blood through the blood vessels. Septum divides the left and right sides of the heart (two pumps) Right ventricle pumps blood through the pulmonary circuit. Left ventricle pumps blood through the systemic circuit. The wall of the left ventricle is thicker than the wall of the right ventricle because the systemic circulation is a much higher pressure system than the pulmonary circulation. The direction of blood flow through the heart is controlled by unidirectional valves.

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