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The Circulatory System: The Body's Highway

758 words - 4 pages

The circulatory system is one that your body needs in order to stay alive, and without it, your body would be virtually unusable, with no oxygen to fuel any of its actions. The circulatory system is one of the most important in the body, and in this piece I will explain why and how it keeps you alive.

The heart is a muscular organ that is meant to pump blood throughout the body. it is located medial to the lungs in the thoracic region. The bottom apex of the heart is turned to the left. this is so that 66% of the heart is located on the left side of the chest while the other 33% is on the right side. The top of the heart connects to the aorta, vena cava, pulmonary trunk and veins. There are two primary circulatory loops: the pulmonary and the systemic. The pulmonary circulation loop transports the deoxygenated blood from the right side of the heart to the lungs. This is where the blood is oxygenated and can then be transported by the systemic loop from the left side of the heart to the rest of the body (minus the heart and lungs). This circulation also removes waste from the body and and returns the deoxygenated blood to the right side of the heart. Blood vessels enable blood to flow efficiently from the heart to all of the body and back again. The size of them depends on the amount of blood that is to flow through. All of these vessels contain a hollow passageway in which the blood is supposed to flow through.

The heart is one of the most important organs inside of the Circulatory System, which keeps the entire body oxygenated, pumping important nutrients that your body needs through the bloodstream to other parts of the body. The average heart weighs around 9 ounces and beats at about 70 times per minute. It pumps about 2,000 gallons worth of blood through the body every single day. The rate at which the heart pumps is affected by fitness and other factors. The healthier a persons heart is, the lower the resting heart rate will be. Hormones released by glands can also affect the heart rate. The heart has three layers, the strongest, which is myocardium. Epicardium, a thin membrane that is the outermost layer, and the endocardium...

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