Watch the video: How does the heart work?

The heart is a pump. It is a muscle organ of the size of the hand of the hand and is located in the middle of the chest, but it is a bit to the left heart divided into two sides of the right, and the left prevents this section from mixing blood rich in oxygen with the poor blood with the heart of the heart and the blood vessel system is the cardiovascular system that is the blood and the From the body in the fact that the body in the body is blood in every minute in every minute 100,000 times a day – that is, equal to 35 million times a year – poor blood with oxygen (blue blood) returns to the heart after it throughout the body the right of the heart consisting of the right atrium and the right ventricle, collects and pumps the blood to the lungs through the pulmonary arteries. The left atrium and the left ventricle are pumped by the aortic artery into the different organs and tissues of the body to provide the tissues with oxygen. In the second when the heart beats, it contracts, then the contracting is called the systole and the extension called daastoles during the contracting reduces the two ventricles, which push the blood from the inside to the blood vessels that spread it to the lungs and the body, such as the ketchup that is pushed into sequence to get out of the right ventricle, with a little in the left, and the left, then the left, and the left, Phase, a little is filled before the windows are expanded. Flow from the atria and then the cycle starts again, the heart itself must also be provided with blood vessels called the coronary arteries on the surface of the heart and branched in smaller blood vessels, and here you see the blood vessels that feed the heart with oxygen -rich blood, and there is a network of electric transport in the heart and it keeps the constant with the right. to reach reference to the start of the pump. The electricity connection device maintains the continuation of the heart with a pulse rate in consistency and at a good rate, which causes the blood to flow properly to replace this process by keeping poor blood with oxygen with oxygen, which keeps us alive.