Physiology assignment Example | Topics and Well Written Essays - 500 words - 1

Physiology - Assignment Example During the period referred to as the relaxation time, blood flow into the atrioventricular valves that in design makes a separation between the left and right atrium. In this case, the blood flows via the atrioventricular valves that separate the ventricles from atria. Blood is received from the right auricle that comes from the rest of the body parts and is transmitted via the inferior and superior vena cover (Philbrick). Therefore, in the cardiac cycle, the blood will be flowing through the heart during the complete heartbeat process. In this case, the systole stands for contraction and the diastole stands for the relation. Considering cases where pressure on the valves varies from that set on the other side of the valve results into an opening of the valve. The illustration on the diagram represents a cardiac cycle within the cardiac left ventricle. However, in the atrial pressure plot: wave "a" corresponding to atrial contraction. Wave "c" represents an increase in pressure emanating from the closed mitral valve. That is the wave going into the atrium in ventricular systole, as well as "v" standing to inactive atrial filling. In the electrocardiogram: wave "P" resembles the inception of atrial depolarization, waves "QRS" match to the onset of ventricular depolarization, as well as "T" tallies to ventricular repolarization. Therefore, the pressure in the cardiac system forces for relaxation and contraction of the muscles in the heart therefore causing the flow of blood to various parts of the heart and the entire body. One of the reliable mechanisms of stroke volume control is the preload mechanism. Preload mechanism is the point of stretching in cardiac muscle cells before contraction. That has a clear explanation of Franks’ Starling law of the heart (Philbrick). Another most important factor in cardiac stretching is venous return. It considers the amount of blood coming from the rest of the body parts. In this case, slow exercise