The heart is the most important member of the human body after the brain, it is the basis of life of the body, the heart is a powerful muscle working to pump blood to all parts of the body through a complex network of arteries and veins, and the heart is in the center of the rib cage, The heart functions in many important functions, the most important of which is the transfer of oxygen and food to all tissues and cells of the body, and the transfer of toxins and waste to the output device, where Transferring oxygen from the lungs through The arteries to different parts of the body, and transport the waste material across the veins to be put through the bladder, and then out of the body. It is known that the tissues of the body need a constant supply of nutrition in order to be active, in the absence of the ability of the heart to provide cells and tissues with blood, it will lead to death. [2] Heart parts The heart consists of four compartments, namely: right atrium,, The right ventricle, and the left ventricle. These cells separate a wall of tissue called septum and cover the heart through a thin membrane called the peritoneum. Blood is pumped through the four chambers through the four valves that open and close to allow the blood to flow only one way. The four valves are: [3] The Mitral valve, located between the left atrium and the left ventricle. Pulmonary valve: The pulmonary valve is located between the right ventricle and the pulmonary artery. Tri-balconies: The Tricuspid valve, located between the right atrium and the right ventricle. Aortic valve (Aortic valve), located between the left ventricle and the aortic artery. The heart cycle begins with the blood in the poor blood, which comes from the body and flows to the right atrium, and then flows blood from the right atrium to the right ventricle, which acts as a pump blood to the lungs. Inside the lungs, blood releases carbon dioxide and picks up oxygen. The oxygen-rich blood from the lungs returns to the faster atrium through the pulmonary veins, and then the blood flows through the left atrium to the left ventricle. Finally, the left ventricle pumps oxygen-rich blood across the aorta to all parts of the body. [1] Heart Facts The heart pumps about 4.7 liters of blood every minute of human life. This amount is about six times more likely to increase in physical activity, Or exercise, or exposure to extreme stress, [4] and the rate of heartbeat in the adult man between sixty to eighty pulse per minute, and decreases this rate in the elderly, and increase in children to range from seventy to one hundred and ninety per minute [2] The heart needs to Oxygen needs to be fully functioning, requiring about seven percent of the oxygen charged through the blood to pump blood efficiently. [5] Any deficiency in this ratio causes anaerobic metabolism, causing severe chest pain called angina. [6] The weight of the heart is between 250-350 grams in females and 300-350mg in males. It is about the size of the fist of the left hand of the human. It is worth noting that athletes are gaining weight in order to be able to exert the effort to pump more blood. The heart is exposed to many diseases including irregular heart rate: (Arrhythmia), an abnormal arrhythmia in the heartbeat, and there are different types of it. The heart can beat very slowly, with a heart rate of fewer than 60 beats per minute, or very fast, with a stroke rate of more than 100 beats per minute, Or fail irregularly. Heart arrhythmias affect heart function. The heart may not be able to pump enough blood to meet the body's needs. Heart failure: Heart failure is sometimes called congestive heart failure. [8] Atherosclerosis, a condition that develops when a plaque called plaque accumulates in the walls of the arteries, narrowing the arteries, making it difficult to flow through the blood. Arteries. If a blood clot occurs in these arteries, blood flow can stop, and this can cause a heart attack or stroke. [9] Heart attack occurs when the blood clot occurs in a part that stops blood flow to a part of the heart. If this blood clot completely cuts off part of the heart, this part will die. Most people survive their first heart attack, but they have to change their lifestyle according to the doctor's advice, depending on the extent of heart damage. [8] Stroke occurs when blood flow stops in the blood vessels that feed the brain, The death of this part of the brain cells, therefore, the inability to perform certain tasks, such as walking and talking, the most likely cause of the stroke is uncontrolled hypertension. [8] Heart valve diseases: There are two main types of heart valve diseases, namely: [8] ] Narrowing the arteries: Stenosis, and occurs when the heart valves do not open enough to allow blood flow. Regurgitation: It occurs if the valves do not close properly, leading to leakage of blood. Mitral valve relaxation: (English