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.
â¢ PULMONARY TRUNK (noun). The noun PULMONARY TRUNK has 1 sense: 1. the artery that carries venous blood from the right ventricle of the heart and divides into the right and left pulmonary arteries. Familiarity information: PULMONARY TRUNK used as a noun is very rare.. the artery that carries venous blood from the right ventricle of the heart and divides into the right and left pulmonary arteries. Familiarity information: PULMONARY TRUNK used as a noun is very rare.