Can anyone explain working of human heart?
heart is the most important muscle in the human body. Without the heart a person cannot live. How does it work? To understand how the heart works, we must first understand a little anatomy of the human heart. The human heart is about the size of its owner’s fist and is located in what is called the thoracic cavity. The heart acts as a pump to circulate the blood. The human heart has four chambers. The two upper chambers are known as the atria, and the two lower chambers are known as the ventricles. The atria contract at the same time. When atria contract, blood is forced into the heart’s lower chambers which are the ventricles. Both ventricles receive blood from their respective atria. For example the left ventricle receives blood only from the left atrium and vice versa. The ventricles them contract simultaneously to pump blood out of the heart. Blood flow in the heart has a definite pathway. Blood enters the right atrium, passes on to the right ventricle, moves to the lungs, then ret
