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Why is my heart off middle located in the chests? The center, actually, is located in the center of the chest, behind the sternum (or the breastbone). However, part of it is slightly offset left, as you can figure out from the picture previously mentioned. For understanding this, http://morningheart.com/where-is-the-heart-located-and-knowing-the-disease think prerequisite knowledge of the heart's simple anatomy is required. Okay, to start with, I would have to refute Andrew's factors vis-a-vis the evolutionary motive and the sternum supplying resistance. There is absolutely no reason why the center should be an improved place for the heart to be than the best suited or the left sides of the chest. When the body was evolving, aspect had to fit sophisticated organs in the most effective of methods in the very small space of a body. Thus, our bodies are full of small asymmetries. Some simple things had to be put in the centre, some plain stuff in the left and some things in the right. The heart is merely in the centre because there will be lungs on the either part and therefore, there is no space left on the relative sides in the thoracic cavity. Regarding the point you elevated about the sternum, Andrew, the heart is enclosed in a double walled sac referred to as pericardium. The pericardium's primary capabilities are to protect the cardiovascular system and anchor it to the structures around it, to reduce friction although it beats and to protect it from overdilating (or overexpanding). So there is absolutely no question of the cardiovascular system pushing against the sternum anytime. The soreness which would generate if your bare center pushed against the sternum would be unbearable. The pericardium restrictions the movement of the heart. The sternum doesn't. Now, to learn why the center is offset left slightly, one got to know about the basic functioning of the cardiovascular system and how circulation can be brought about in our body. The human being heart has 4 chambers, namely the Left Atrium (LA), the Left Ventricle (LV), the Right Atrium (RA) and the Right ventricle (RV). The atria will be the getting chambers and the ventricles will be the discharging chambers. In mammals, the function of the proper side of the heart is to acquire de-oxygenated blood, in the right atrium, from the body which, via the right ventricle, is then pumped to the lungs for oxygenation. The left side collects oxygenated blood from the lungs in to the left atrium then. From the still left atrium the blood techniques to the left ventricle, through the which pumps it out to the body. On both sides, the low ventricles are thicker and more powerful compared to the upper atria. On the other hand, the muscle wall surrounding the left ventricle is much thicker compared to the wall surrounding the right ventricle due to the higher force had a need to pump the blood through the whole of the body (systemic circulation). However, the right ventricle has to pump blood only to the lungs, which happen to be close enough. Hence, the increased muscle tissue of the LV triggers it to offset slightly to the left and since it is the largest area of the center, it gives a significant impression of the heart being more to the left. This is likewise the reason that you feel the pulse on the left aspect of the chest since the LV generates the highest pressure.