CARDIAC CYCLE AND ELECTROCARDIOGRAPHY.docx

CARDIAC CYCLE AND ELECTROCARDIOGRAPHY.docx - CARDIAC CYCLE...

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CARDIAC CYCLE AND ELECTROCAR DIOGRAPHY Submitted to, Submitted by, Dr. Susan. Briffa Sheena. Mathukutty Bio 150 Section #: D002 Lab #: 11 Date: 04/20/16
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RESULTS :- A single cycle of cardiac activity can be divided into two basic phases - diastole and systole . Diastole represents the period of time when the ventricles are relaxed (not contracting).Throughout most of this period, blood is passively flowing from the left atrium (LA) and right atrium (RA) into the left ventricle (LV) and right ventricle (RV), respectively . The blood flows through atrioventricular valves (mitral and tricuspid) that separate the atria from the ventricles. The RA receives venous blood from the body through the superior vena cava (SVC) and inferior vena cava (IVC). The LA receives oxygenated blood from lungs through four pulmonary veins that enter the LA. At the end of diastole, both atria contract, which propels an additional amount of blood into the ventricles.Systole represents the time during which the left and right ventricles contract and eject blood into the aorta and pulmonary artery, respectively. During systole, the aortic
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