PPT-The cardiac cycle and pressure changes

O Level Biology M Shah Todays lesson Topic covered Transport in Humans Syllabus requirement ddescribe the structure and function of the heart in terms of muscular contraction and the working of the valves. Learning Outcomes. During diastole blood returning to the atria flows into the ventricles. Atrial systole transfers the remainder of the blood through the atrioventricular (AV) valves to the ventricles. Ventricular systole closes the AV valves and pumps the blood out through the semi lunar (SL) valves to the aorta and pulmonary artery. In diastole the higher pressure in the arteries closes the SL valves. The opening and closing of the AV and SL valves are responsible for the heart sounds heard with a stethoscope. . Guyton’s Models as an Example. Mean Arterial and Venous Pressure and Cardiac Output. If the compliance ratio is 19:1, for which cardiac output is the ratio of venous to arterial volume 19:1?. What is peripheral resistance at CO=0?. Circuits of the Blood. There are 3 circuits:. Systemic Circulation. From the left ventricle to the aorta and on to the body. Back to the heart via the superior and inferior vena cava to the right atrium. AN OVERVIEW OF RECIPROCATING ENGINES. Spark-ignition (SI) engines. Compression-ignition (CI) engines. Compression ratio. In SI engines, the compression ratio is limited by . autoignition. . or . engine knock. MABP = CO x TPR. Mean Arterial Blood Pressure. MABP = CO x TPR. Mean Arterial Blood Pressure. Mean Arterial Blood Pressure. = Average blood pressure in an individual, the overall blood pressure within your body.. Guyton’s Models as an Example. Mean Arterial and Venous Pressure and Cardiac Output. If the compliance ratio is 19:1, for which cardiac output is the ratio of venous to arterial volume 19:1?. What is peripheral resistance at CO=0?. : One complete heartbeat. . The contraction of a heart chamber is called . systole. . the relaxation of a chamber is called . diastole. . . . During ventricular systole, the aortic valve __________. Learning Objectives. Explain how the heart works in relation to the conduction system . Explain the cardiac cycle. Explain how the two systems are linked . How does the heart contract.......?. Heart is composed of cardiac muscle. Understandings. U.D.4.1: structure of cardiac muscle cells allows propagation of stimuli through the heart wall. . U.D.4.2: signals from the sinoatrial node that cause contraction cannot pass directly from atria to ventricles.. At a normal heart rate of 75 beats per minute, one cardiac cycle lasts 0.8 second. Under resting conditions, systole occupies ⅓ and diastole ⅔ of the cardiac cycle duration. Pressure As a chambe Sassano. & Sarah Miller. The Cardiac Cycle. The period between the start of one heartbeat and the start of the nest is a single cardiac cycle. Can be divided into two phases:. During contraction, or systole, the chamber squeezes blood into adjacent chamber. A PRESENTATION COMPLIED BY : . ATUMA CHUKWUBUEZE LUCKY 17/MHS05/006. MAHMUD HADIZA . 17/MHS01/181. COURSE: PHS 306:. LECTUREER: DR EDEBOR. CARDIAC CYCLE. Cardiac cycle is the series of event that takes place within one heart beat.. catheterisation. Dr. Amol Patil. SR , . Dept. of cardiology,. GMC, Calicut. Overview. Introduction. Basic principles and physics of cardiac catheterization pressure measurement. Atrial pressure tracing . . . failure of the heart to pump blood adequately. Cardiac failure is manifested by two ways---. 1) . C.O.. 2) . C.O.. . . .