Transport-Homeostasis Assignment Example | Topics and Well Written Essays - 3750 words - 1

Transport-Homeostasis - Assignment Example 1.2 The heart is a critical muscle within the body whose location is between the lungs and whose chief purpose is pumping of blood throughout the entire body. This role is executed with the assistance of Pulmonary Circulation and Systematic Circulation which are tasked with blood circulation. The heart consists of 4 chambers; 2 upper atria as well as 2 lower ventricles. Both the left and right sides of the heart operate together. Blood enters into the right side of the heart via 2 big veins; the superior and inferior vena cava, which empties deoxygenated blood from various parts of the body inside the right atrium. The pulmonary vein on the left side then pours oxygenated blood from the lungs and into the left atrium. The atrial contraction occurs when blood flows from the right atrium and into the right ventricle via the tricuspid valve that is usually open. The tricuspid valve normally shuts whenever the ventricles become full, a role that holds blood from backward flow into the at ria as the ventricles squeeze/contract. On the left side, blood flows from the left atrium and into the left ventricle via the open mitral valve. Whenever the ventricles fill, there is shutting of mitral valve which stops blood from backward flow and into the atria as the ventricles contract (squeeze).Ventricular contraction comprises of carbon dioxide and oxygen travelling to and from small numerous air sacs in the lungs via the capillaries walls and into the blood. On the right side, blood comes out of heart via the pulmonic valve and into the pulmonary artery and finally finds its way to the lungs. On the left side, blood comes out of the heart via the aortic valve, and into the aorta and finally to the body. Normally this pattern is normally repeated, resulting in the continuous flow of the blood to the heart, then lungs and onto the entire body (Storad, 2006). 1.3 The circulatory system comprises of the blood vessels, the