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.
The wavelike contractions of the smooth muscle in the  gastrointestinal system are called peristalsis. The purpose of  peristalsis is to push boluses of food along the gastr â¦ ointestinal  tract. This is achieved by the waves of contractions in the smooth  muscle followed by relaxation of the muscles, pushing the bolus  (ball of food) a bit further along the digestive tract with each  contraction. These contractions move food or chyme through the  esophagus, and intestines.