Function Of Heart: The Functions Of The Heart

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The function of the Heart:
The heart is the centre of the circulatory system which functions as a pump for the movement of the blood through the body, through a transport system of arteries, veins and capillaries. If blood is the body’s fuel, the heart is its engine. When the heart is relaxed it is called diastole - the resting phase of the heart and when the ventricles of the heart contract, it is called systole - the working phase of the heart.
The blood circulation is two closed systems.
The Pulmonary Circulation – is the transport of blood from the heart to the lungs and back again.
In this circulation (this is the only time one will see an artery carrying deoxygenated blood) the pulmonary artery carrying deoxygenated blood to the lungs …show more content…

Without pressure blood would not move at all, as a certain amount of pressure is needed to keep the blood flowing throughout the body. Blood is always under pressure but the amount of pressure varies throughout the different blood vessels. High blood pressure in the arteries gradually becomes lower in the capillaries and veins.

The blood entering the heart, into both atriums at the same time, when full the pressure causes the tricuspid and bicuspid valves to open and blood flows into the ventricles. The ventricles contract (systole) and the atria relax (diastole) and the pressure closes the valves allowing the deoxygenated blood to enter the heart to become oxygenated and a higher pressure when reaching the aorta oxygenated to enable it to circulate throughout the body. Without blood pressure, blood would not move.
Blood itself, transports oxygen, nutrients, hormones and enzymes around the body. It transports carbon dioxide and waste materials from the body to be excreted from various organs. Helps us fight infection, clots after accidents and regulates body temperature. Without the pressure forcing the blood around the body none of these actions would take

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