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Pulmonary Circuit Lab Report

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The heart circulates blood through two pathways: the pulmonary circuit and the systemic circuit. The pulmonary circuit is made up of the heart, lungs, pulmonary veins and pulmonary arteries. This circuit pumps deoxygenated blood from the heart to the lungs where it becomes oxygenated and returns to the heart. The systemic circuit is made up of the heart and all the remaining arteries, arterioles, capillaries, venules, and veins in the body. This circuit pumps oxygenated blood from the heart to all the tissues, muscles and organs in the body, to provide them with the nutrients and gases they need in order to function. The heart contains electrical pacemaker cells, which cause it to contract. THe contraction of the heart produces a heartbeat. …show more content…

Valves contribute to preventing backflow, ensuring that the blood continues to flow in one direction through the heart. The heart is a single organ, but it acts as a double pump. The first pump carries oxygen-poor blood to your lungs, where it offloads carbon dioxide and picks up oxygen. It then delivers oxygen-rich blood back to your heart. The second pump delivers oxygen-rich blood to every part of your body. Blood that needs more oxygen is then sent back to the heart to begin the cycle again. The right ventricle pumps blood to your lungs and the left ventricle pumps blood all around your body. The muscular walls of the left ventricle are thicker than the walls of the right ventricle, making it a much more powerful pump. Because of this, it is easier to feel your heart beating on the left side of your chest. Simply, the left and right ventricles enable the heart to produce its double

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Deoxygenated blood is fed into the right atrium, pulled down into the right ventricle and then pumped to the heart along the pulmonary artery to the lungs. Once passed through the lungs, the now newly oxygenated blood is fed into the left atrium via the pulmonary vein and drawn down into the left ventricle. In order for the maximum volume of newly oxygenated blood to be then pumped out of the heart, via the aorta, to the rest of the body, the valve must open wide enough to allow the blood to make it into the ventricle, and close firmly enough to ensure that there is no backflow. If this does not happen, the maximum volume of oxygenated blood does not reach the rest of the body, and the system becomes inefficient as the cardiovascular system has to then work harder and faster to get the same volume of oxygenated blood to the surrounding body. This takes more energy, which could otherwise be better used.

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Conduction of the heart Carried out by electrical impulses from the heart muscle( the myocardium) which causes the heart to beat. This beat is caused by the sinoatrial node firing at the top of the atrium. This natural pacemaker sends a signal to the atrioventricular node which sends the signal to the muscle fibers causing them to contract, all of this is done involuntary. The heartbeat is a two part pumping action that takes about a second.

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The cardiovascular system is broken down into two circulatory pathways: systemic circulation and pulmonary circulation. Systemic circulation carries oxygenated blood away from the heart to the body or organs, and then returns deoxygenated blood to the heart. Whereas the pulmonary circulation transports deoxygenated blood from the body or organs to the right side of the heart to the lungs and return oxygenated blood to the left side of the heart (Marieb, Nicpon, and Hoehn, 2013). The cardiac cycle consists of an ejection and a filling stage: systole and diastole, respectively. During the diastolic phase the heart ventricles are relaxed as the heart fills with blood, and blood pressure is the lowest; during the systolic phase the heat ventricles contract and pump blood out of the arteries, and blood pressure is increasing.

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If a person does not have a cardiovascular system that is in good working order, it can be a fatal situation. Along with pumping blood to the body, the cardiovascular system also brings oxygen and nutrients to all of the different organs and tissues within the body. As our blood makes its circuit journey from the heart to the extremities and then back to the heart, waste is removed from the cells as well. For the cardiovascular system to function at an optimal level, it needs to be healthy and fit.

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Section A – Part II Cardiac cycle or heartbeat Blood enters and fills both atriums at the same time. When full the pressure causes the tricuspid and bicuspid valves to open and flows into the ventricles. Contraction (systole) of each atrium now forces any remaining blood into the ventricles. The ventricles now contract (systole) and atriums relax (diastole). The pressure closes the tricuspid and bicuspid valves (causes the first sound of the heart beat).

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Blood is then pumped from the right ventricle into the pulmonary arteries. The pulmonary arteries carry the deoxygenated blood to the alveoli inside the lungs. Through a process called diffusion, which is when molecules move from an area of high concentration to an area of low concentration (Caroline 198). The carbon dioxide inside

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The correct side of the heart, including the correct chamber and ventricle, gathers and pumps blood to the lungs through the pneumonic conduits. The lungs revive the blood with another supply of oxygen. The lungs additionally inhale out carbon dioxide, a waste item. Oxygen-rich blood then enters the left half of the heart, including the left chamber and ventricle.

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Blood in oxygen from the systemic circulation enters the right atrium from the superior and inferior vena cava and passes to the ventricle. From here it is pumped into the pulmonary circulation, through the lungs where it receives oxygen and gives off carbon dioxide. Oxygenated blood then returns to the atrium, passes through the left ventricle and is pumped out through the aorta to the systemic circulation_ where the oxygen is used and diabolized to carbon dioxide. Describe the condition Hypertension: This is blood pressure that consistently remains above the normal level of 120/80.

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The heart pumps out blood to the arteries that travel throughout the body. The capillaries connect the arteries to the veins. The veins take blood back into the heart in a cycle. Some other features

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The aorta is the largest artery in the body. The blood that leaves the aorta is full of oxygen, this is important for the cells and the brain to do their work. Oxygen reaches the blood and travels throughout the body in its system. On its way back to the heart the blood travels through a system of veins as it reaches the lungs, the carbon dioxide (waste product) is removed from the blood and replaces with fresh oxygen, which we inhale through the lungs. The heart muscle contracts and relax-es.

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