In mathematics, mean has several different definitions depending on the context. In probability and statistics, mean and expected value are used synonymously to refer to one measure of the central tendency either of a probability distribution or of the random variable characterized by that distribution.
Red Blood Cell Route through the Cardiovascular System. Let us follow a single red blood cell (RBC) through one full cycle along the circulatory pathway Remember that RBCs carry oxygen throughout the body.Since the blood travels endlessly, an arbitrary choice must be made of a starting point to describe the RBC's route.. The RBC is then pumped through the pulmonary valve into the pulmonary artery and on to the lungs. There the RBC gives off carbon dioxide and picks up oxygen. 4. The RBC returns to the heart through a pulmonary vein, enters the left atrium, passes through the mitral valve, and flows into the left ventricle. 5.
It begins after the aortic valve where blood has left the heart, and ends in the superior and inferior vena cavae that bring deoxygenated blood from the organs back to the heart. Summary: The heart pumps blood through the coronary circulation to supply oxygen to the heart itself, and through the systemic circulation to supply the entire body other than the heart. Deoxygenated blood from all parts of the body enters into the heart through the superior and inferior vena cava. The blood enters the right atrium. When the right atrium contracts the blood is pushed into the right ventricle through the tricuspid valve.