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.
In a nutshell, judicial review is the power of a court to review the actions of executive or legislative bodies to determine whether the action is consistent with a statute, a treaty or the U.S. Constitution.