Coronary Heart Disease

The human nub is one of the bodies vital organs. The heart is do up of quadruple separate chambers, the tune wield taboo of these chambers flows through a series of descent vessels. The vessels fanny either be classed as part of the pulmonary dress circle (carrying blood to the lungs w here gas exchange takes place), or the systemic overlap (in which the remaining blood is transported to the slackening of the body). 1 It is for this reason that the heart is referred to as a double-pump, keeping both oxygenated and deoxygenated blood separate.2 Of these four chambers, the right atrium and heart ventricle are part of the pulmonary locomote, whilst the leftover atrium and ventricle are part of the systemic circuit.
The right atrium receives deoxygenated blood from the systemic circuit and thus pumps the blood into the right ventricle, which is then pumped to the pulmonary circuit around the lungs, becoming oxygenated. From here the blood returns to the heart through the left pulmonary artery, where it arrives at the left atrium, then pumping blood into the left ventricle, and from there is pumped out of the heart through the aorta, and then around the recline of the body before entering again at either the superior or inferior vena cava into the pulmonary circuit once again. 3 See fig.1.



As mentioned, the right ventricle only needs to pump to the lungs whilst the left has to pump to the rest of the body, so needs to exert a blood at a higher pressure than the right ventricle, it is for this reason that it has a thicker muscle wall (although the same volume of blood is outfit from each ventricle).
The heart is a muscle, and needs a replete supply of oxygen and nutrients to the myocardium (heart muscle). This is the role of coronary circulation system, made up of blood vessels that cover the heart, supplying and draining it of oxygen (fig 2. shows blood vessels on the heart). The heart is a continuous working organ, so it is vital it receives this blood. Also as exertion on the body...If you loss to get a full essay, order it on our website: Orderessay



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