a wavelike contraction that propels the contents of tubular organs, for example, the intestine, stomach, and ureters, caudally in animals or in a downward direction in man. Peristalsis is the result of many coordinated contractions of the longitudinal and transverse muscles in the walls of a tubular organ.
Judicial review is important in the US government because it serves as a check on the other branches of government. Judicial review is the power established through the landmark supreme court case Marbury v. Madison. It allows a higher court to review cases with questionable constitutionality. It also allows the supreme court to rule acts of Congress or of the President as unconstitutional and have them removed.
Judicial review is a process under which executive and legislative actions are subject to review by the judiciary. A court with judicial review power may invalidate laws and decisions that are incompatible with a higher authority; an executive decision may be invalidated for being unlawful or a statute may be invalidated for violating the terms of a written constitution. Judicial review is one of the checks and balances in the separation of powers: the power of the judiciary to supervise the leg