Right Atrium Research Paper

The heart is comprised of four chambers, the right atrium, right ventricle, left atrium and the left ventricle. The right atrium is the chamber which receives blood from the body that has been depleted from its oxygen and pumps it to the right ventricle. The right ventricle then pumps the blood from the right atrium over to the pulmonary artery which as the name would suggest means it goes to the lungs and the oxygen depleted blood is once again oxygenated. The left atrium of the heart then receives the blood that has been oxygenated to the left ventricle. Finally the blood arrives at the left ventricle, the thickest of all chambers, the reason for that is because it is the most worked chamber for it is in charge of pumping blood throughout the entire body. Aside from the four chambers the heart also consists of three walls. The outer wall is known as the epicardium, then there is the …show more content…
The second stage is the atrial systole, during this stage the atrium contracts which allows blood flow from the atrium to the ventricle. The third stage is known as the isovolumic contraction, which is the stage where ventricles begin contracting, the aortic and semilunar valves close which prevents a change in volume. The fourth stage, ventricular ejection, is the moment where the ventricles are emptying themselves through contractions. The final stage is called the isovolumic relaxation time, during this stage pressure decreases, no blood enters the ventricles, the ventricles then begin relaxing and the semilunar valves close due to pressure of blood found in the aorta. The heart also has a conduction system which allows a pulse to be generated by the sinoatrial node, which stimulated the cardiac muscle, aka the myocardium. The myocardium contracts while propagated which causes a rhythmic pulse in the cardiac