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.
Transportation: The cardiovascular system transports blood to almost all of the bodyâs tissues. The blood delivers essential nutrients and oxygen and removes wastes and carbon dioxide to be processed or removed from the body. Hormones are transported throughout the body via the bloodâs liquid plasma.