Science of Heart

Science of Heart

INTRODUCTION

The heart is the main organ of the cardiac system and one of the most important human being. It is a muscular organ, responsible for receiving and pumping blood to circulate it throughout the body. Because of its great importance, has always been subject to myths and popular beliefs through history, reaching regarded as a body with special powers and the head of human emotions. Therefore, it is popularly known around the world as the symbol of love (SCENIHR, 2007).

Despite all faiths, the heart is more than just a body organ, though one of the most important and impressive. It is a conical structure, with its point down and to the left, made of muscle and blood vessels. In an adult, is the size of a fist and weighs between 300 and 350 grams. It is located between the lungs, with a tendency to the left, behind the breastbone (Institute of HeartMath, 2012).

DISCUSSION

The heart consists mainly of muscle mass called myocardium or heart muscle. It is covered by a layer of endothelium overlying call endocardium and double membrane wall epicardium and pericardium calls. Furthermore, there is the pericardial cavity, located between the two walls, which is a lubricating liquid, allowing the heart to beat without friction (Institute of HeartMath, 2012).

The heart is connected to the blood vessels, specifically, to the veins and arteries. The veins are those that carry blood to the heart from the body's organs. Those that get to the heart are the two vena cava and the four lungs. Reach the vena cava into the right atrium and the pulmonary into the left atrium. Veins carry blood to the heart continually open and freely on their walls. As the arteries are the vessels that carry blood from the heart to the organs from the heart and pulmonary artery the large artery aorta, right ventricular and the other, the left ventricle. Unlike veins, these arteries do not work freely, since the administration of blood to them, is regulated by the semilunar valves, which let out blood only when pressure in the ventricles when they contract (Institute of HeartMath, 2012).

The heart is a pump that circulates blood through a contraction (systole) and relaxation (diastole) and constant rhythm. Unlike other muscles subjected to the will, the heart performs its movement automatically. If it were to stop, it means the death of the person. The heart then produces ...