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Life Sciences
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Cardiovascular system (Blood and Heart) Just Human (Research Paper Sample)

It needs to have at least 5 sources include source form my text book. I will attach file that i took from my text book. And another file is a guidelines that you need to cover. After you read the guideline(2,3) please let\'s me know what I need to draw which are match with your document. don\'t forget bibliography. Thank you please finish it at August 10,2013 before 1 PM thank you source..
The heart is usually considered one of the most significant organs in the human body. More or less, it is a pump comprised of materials that assist the functions of the human bodies and eliminates the waste products that are not required in the system (Tortora, 12). The heart is required to pump throughout a lifetime of human beings because if ever it stops to pump blood, there is a great likelihood of the body shutting down and even resulting to death after a very short time. The heart performs a very crucial role and thus is worth discovering its functions through the structural components and chronic conditions that may affect it.
The Structural Components and Functions
Heart’s walls are consistent of three layers and the cavity is usually split into four fractions. Two chambers are found at the upper part of the heart and are namely, left and the right atria, while the chambers on the lower part are called left and right ventricles. The right upper chamber, which is the Right Atrium, takes delivery of the blood from the lower and upper body via the superior vena cava as well as the inferior vena cava in that order. In addition, it receives blood as well from the heart muscle via the coronary sinus (Little, William, 10). Between the two atria, the right atrium is the larger and bears very thin walls. The right atrium then opens up to the right ventricle via the so called right atrioventicular valve also known as tricuspid that specifically permits the blood in flowing into the ventricles from the atria though not in the direction of reverse. The right ventricle pushes the blood into the lungs so that it can be reoxygenated. In addition, the left atrium takes delivery of the blood from the lungs through the four known pulmonary veins (Al Suwaidi, Jassim, 15). The left atrium as early stated is minor than the right atrium but its walls are usually thicker. The valve that exist between left the ventricle and left atrium as well as the left atrioventicular valve also known as bicuspid, is tinier than the tricuspid, opening up to the left ventricle being a valve of one way. The left ventricles perform the work of pumping the blood all through the body, while the largest artery in the entire body called aorta initiates as of the left ventricle.
The Cardiac Cycle
The heart functions like a pump that moves blood around the human body for purpose of nourishing all the cells. The blood that is used, or rather the one that has already been spread to the cells to the extent of giving away the nutrients to them, always is drained from the body through the right half portion of the hear...
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