Where is the heart in the human body?

The heart is above the diaphragm, between the lungs, on the left.

The human heart looks like a peach, located above the diaphragm, between the lungs and on the left. The hollow organ mainly composed of myocardium has four cavities: left atrium, left ventricle, right atrium and right ventricle.

The left ventricle is connected to the aorta, the right ventricle to the pulmonary artery, the left atrium to the pulmonary vein, and the right atrium to the superior and inferior vena cava. The left and right atria and the left and right ventricles are separated by a diaphragm, so they are not connected to each other. There is a valve between the atrium and the ventricle.

These valves only allow blood to flow from the atrium into the ventricle, not back. The function of the heart is to promote blood flow, provide sufficient blood flow for organs and tissues to supply oxygen and various nutrients, and take away the end products of metabolism, so that cells can maintain normal metabolism and function.

Extended data:

Hypertension is the most common risk factor for cardiovascular and cerebrovascular diseases. At present, there are 270 million hypertensive patients in China, but the awareness rate, treatment rate and compliance rate of hypertension are still obviously low. Maintaining normal blood pressure level is very important for the maintenance of the heart.

Because even the best "engine" can't stand too high pressure. Elevated blood pressure will destroy arterial endothelium, which is the basis of atherosclerosis.

The international understanding of normal blood pressure level is becoming more and more unified, and normal blood pressure should not exceed 120/80 mm Hg. If120/80mm Hg exceeds140/90mm Hg, it is called hypertension, and the change of blood pressure needs to be monitored.

Pay attention to individualized standards that vary from person to person in lowering blood pressure. For example, patients with impaired renal function and diabetes should be below 130/80 mm Hg, and the elderly can increase it appropriately.

Baidu encyclopedia-heart

People's Network-the "engine" to maintain the heart