Describe the function of heart..
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Functions of the Heart
Pumping blood is the chief and only function of the heart! Freshly oxygenated blood from the lungs enter the heart which is then pumped out to the rest of the body. After delivering oxygen to all tissues, the de-oxygenated blood returns to the heart, which the heart sends back to the lungs to get re-charged with oxygen. The heart functions as the central point collection and dispatch for blood from the lungs to the rest of the body and vice versa. How it does so is an interesting study. The mechanism of how the heart pumps blood throughout the body is being enumerated as follows:-
The de-oxygenated blood collects inside the right atrium and is transferred or pumped to the lungs via the right ventricle by the tricuspid valve.
Once the carbon dioxide is exhaled and the blood is recharged with oxygen from inhaled air, the re-oxygenated blood collects in the left atrium which is then moved to the left ventricle by the mitral valve which then pumps it out to the rest of the body, releasing the oxygenated blood to replenish the tissues. Refer to a detailed blood flow through the heart diagram to get a clearer idea.
The function of the heart valves is to transport blood from one end of the heart to the other end - from atrium to ventricle and vice versa.
When blood is transported from the right atrium to the right ventricle by the tricuspid valve, it is pumped out via the pulmonary seminular valve through the pulmonary artery to the lungs.
The pulmonary vein carries the oxygenated blood to the left atrium which is then transported by the mitral valve to the left ventricle.
The aortic seminular valve transports this blood from the left ventricle to the aorta which is forked to accommodate the distribution of blood between major arteries that carry blood to the upper and lower body.
From these major arteries branch off arterioles, which further branch off into capillaries. This way, via a complex network of blood vessel tributaries and distributaries, oxygenated blood reaches each corner of the body and invigorates every tissue.