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the structure that separates the right ventricle from the pulmonary artery. It prevents the blood from flowing from the pulmonary artery back into the left ventricle during the general diastole phase of the cardiac cycle.
a biological classification group (taxon) that is divided into families.
the effect of the relative lengths of daylight and darkness on the physiology and behaviour of...
the first part of the intestine, from the pyloric valve of the stomach to the caecum. It...
the form in which excess glucose is stored in the liver and muscles of mammals.