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.
An artery (plural arteries) (from Greek á¼ÏÏÎ·ÏÎ¯Î± (artÄria), meaning 'windpipe, artery') is a blood vessel that takes oxygenated blood from the heart to all parts of the body. The two exceptions to this rule are the pulmonary and the umbilical arteries.