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PostSubject: An article about the heart as a member of anatomical   Thu Oct 06, 2011 5:03 pm

Heart is a hollow muscular User who pays the blood within the circulatory system, similar to the work of the pump, forming a key member of the cardiovascular system or what is known as the circulatory system.
A heart muscle tissue of effective and functionally from the heart, believe shrinking the blood circulates and pumped from the heart to the rest of the members, which makes the heart the main pumping station of blood from the heart to Aleda for the supply of oxygen loaded in the blood coming from the lungs, then the heart to pump blood coming from the members and carrying carbon carbon dioxide to the lungs for purification and downloading of new oxygen.
The amount of blood pumped by the heart in the natural state of 4.5 to 5 liters per minute, can be increased to three times when you do Eetmarin sports.
You need the heart muscle to 7% of the oxygen carried by blood to produce energy pumping are therefore very sensitive to lack of oxygen, any shortage in the amount of oxygen contained to lead to a type of anaerobic metabolism leads to pain known as angina pectoris (Angina).
Heart weight of 0.5% of body weight that is, up to 350 g for a person weighing 70 kg and this weight can be increased up his work as when athletes. This increase is accompanied by increased blood volume weighted, which pumps in a single pulse increases when athletes what is the amount of blood pumped and not the number of pulses. Blood vessels in the heart as the heart is a muscle moving constantly is the constant need to supply a continuous blood transferred to the cells of food and oxygen, because feces and carbon dioxide which is known Baltroyh are ischemic heart muscle Bashryanin Tagyan (left and right) go out from the beginning of the aorta (aortic) Atafraan to the arterioles and capillaries, where it feeds half-heart
Heart contains four separate compartments called: the left and right atria and left and right ventricles. The walls of the atria are relatively thin because the nature of its core business as a repository of blood and the entrance of the ventricle, it does not work pumping the basic Atkql by the ventricle.
Ventricle walls are thicker because it is based on the basic process of pumping the pulmonary circulation and ocean circulation.
Regulating the movement of blood in the heart valves (also called Dsamat) gates constitute a single directional secure transmission of blood from the atrium to the ventricle does not allow to move the reverse, grouping the basic blood contained the heart occurs in the atrium right to move then to the right ventricle, the right ventricle to pump blood to the lungs, After returning purified blood from the lungs to the left atrium, left atrium from moving to the left ventricle, which in turn pumped through the aorta, or main artery, to the rest of the members.



Principles of ECG

Alsmamt in the heart are Abarhan:




Tricuspid valve (consisting of three pieces of cartilage) separates the right atrium and right ventricle.

Bicuspid valve: separates the left atrium from the left ventricle.

Dsam (valve) three-pulmonary sinus: located at the entrance to the pulmonary artery and secure transmission of blood from the right ventricle to the pulmonary artery without the return of the delivery to the lungs.

Dsam (valve) three aortic sinuses: Located at the entrance to the aorta and secure transmission of blood from the left ventricle to the aorta without return.

Alharianat in general if the blood vessels that carry blood from the heart to other organs, the movement of blood to the lungs bearing Athani carbon dioxide through the pulmonary artery to purified, and the aorta conveys oxygenated blood to the members that need oxygen to complete the operations metabolised.
Veins are the vessels that return Alddm subscribers to the heart, the blood in the pulmonary veins Maxja as it returns from the lungs to the heart. While the blood laden with carbon dioxide Athani in the veins return the blood when the regular subscribers to the heart.

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