Submit. Â· just now. Report Abuse. when a rock is subjected to severe heat, then dramatic cooling onion weathering takes place. This is a form of physical weathering. The sudden change of temperature weakens the outer layer of rock and it will crumble away, this happens to rocks in the desert.
Definition. Common arterial trunk (CAT) is characterized by a single arterial trunk that arises from the base of the heart and gives origin to the systemic, coronary and pulmonary circulation. A large ventricular septal defect (VSD) is almost always present.
arterial pressure - the pressure of the circulating blood on the arteries; arterial pressure is the product of cardiac output and vascular resistance. venous pressure - the pressure exerted on the walls of the veins by the circulating blood. circulation - movement through a circuit; especially the movement of blood through the heart and blood vessels.