The Structure and Function of Heart

The heart is a muscular pump in the chest, which operates continuously, without stopping to pump blood throughout the body morning and evening from birth to death.The heart to contract and relax as much as 100,000 times a day, and all this work requires a good supply of blood delivered to the coronary vessels.

The heart is a muscular pump in the chest, which operates continuously, without stopping to pump blood throughout the body morning and evening from birth to death.The heart to contract and relax as much as 100,000 times a day, and all this work requires a good supply of blood delivered to the coronary vessels.

How the heart works

The basic functions of the heart pumps oxygenated blood and nutrients through the large vessels throughout the body. When oxygen was absorbed by the tissue, veins carry blood to the blue and contains very little oxygen to the heart.

The heart has two sides, each side operates as a separate pump. Each page is divided into two rooms, making a total of four rooms. Two of the above, the atria, it serves as a place to number two under, ventrical, contract to pump blood. The right heart receives blood from the body through a vein and pumped into the lungs to get oxygen. The left side of the heart that the blood remains in the lungs and pumped into the body tissue that needs oxygen.

All the muscles and organs can be achieved in another way, the blood must be pumped under high pressure, as you know, if you cut off ships – the blood spraying everywhere!To do this, then our heart is very strong, and in contrast with our muscles, the heart will never be tired. Therefore, the heart muscle requires a very good movement, and is supplied by the coronary arteries and the branches are available.

Coronary

Coronary artery from the aorta – the major blood vessels of the heart – which had just left pumping chamber of the heart, the left ventricle, the first ships to receive oxygenated blood. Both coronary arteries are the left and right is a relatively small ship, each with a diameter of only 3.4 mm. They walked on the surface of the heart, seeing behind and nearly a circle. If the model of the ship was the first time in a while, they think that looks like a crown (crown), so they use the Latin name, is that today, the coronary arteries (coronary arteries).

Because the artery is so important, his doctors used to (correctly) with the artery and its branches, and the variations that can occur from person to person. The left coronary artery has two main branches called the left anterior descending and circumflex, each of their subsidiaries. They offer almost all of the left ventricle is more muscular than the two chambers of the heart, because they need to pump blood through the body. Right coronary arteries are usually smaller and the supply to the heart and the bottom of the right ventricle, the chamber that pumps blood to the lungs.

Coronary artery has the same structure as the other arteries, but differs in one respect – only blood can flow through these vessels into the heart muscle between beats when the heart stops (relaxed). If the heart muscle to contract, the pressure was so heavy that the blood entering the heart muscle. This means that the heart of an efficient network of fine blood vessels in the heart muscle where it needs to adjust.

In coronary heart disease (CHD), coronary arteries constrict and the heart muscle is deprived of blood and oxygen it needs. In the state of rest is no problem, but when the heart tries harder than usual to work – for example, if you up the stairs – they can not the coronary arteries of oxygen consumption to survive, and you will be a pain in the breast.If you take a break, will disappear in the menstrual pain. If an artery is completely closed (block) of a blood clot, then the surface of the heart muscle dies delivered.

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