Cavalier King Charles and King Charles Spaniel. The Cavalier King Charles Spaniel is one of the most popular toy breeds. But there are two distinctly different breeds of King Charles Spaniels developed from the ancient Toy Spaniel.
Peristalsis. 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.A single peristaltic wave takes the form of a circular constriction around the lumen that moves along the length of the organ.eristalsis is the result of many coordinated contractions of the longitudinal and transverse muscles in the walls of a tubular organ. A single peristaltic wave takes the form of a circular constriction around the lumen that moves along the length of the organ.
Robots have been designed that use peristalsis to achieve locomotion, as the earthworm uses it. Related terms. Catastalsis is a related intestinal muscle process. Aperistalsis refers to a lack of propulsion. It can result from achalasia of the smooth muscle involved. Basal electrical rhythm is a slow wave of electrical activity that can initiate a contraction. Ileus is a disruption of the normal propulsive ability of the gastrointestinal tract caused by the failure of peristalsis. Notes and references