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Which of the following organs help in pumping of blood through the blood vessels of the circulatory system?
1. Aorta
2. Septum
3. Valves
4. Pulmonary Vein
Select the correct answer using the code given below.
1, 2 and 3 only
1, 3 and 4 only
1, 2 and 4 only
All of the above
The heart pumps blood with a rhythm determined by a group of pacemaking cells in the sinoatrial node. These generate a current that causes contraction of the heart, traveling through the atrioventricular node and along the conduction system of the heart. The heart receives blood low in oxygen from the systemic circulation, which enters the right atrium from the superior and inferior venae cavae and passes to the right 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 left atrium, passes through the left ventricle and is pumped out through the aorta to the systemic circulation−where the oxygen is used and metabolized to carbon dioxide.
By: ANIVESH KUMAR ProfileResourcesReport error
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