Thorn (letter) Thorn or Ã¾orn (Ã¾, Ã¾) is a letter in the Old English, Gothic, Old Norse and modern Icelandic alphabets, as well as some dialects of Middle English. It was also used in medieval Scandinavia, but was later replaced with the digraph th, except in Iceland, where it survives.
Hip internal rotation exercises are designed to strengthen the groin, or adductor muscles of the inner thigh. These muscles bring the legs together while the outer hip muscles, called abductors, pull the legs apart. Muscular strength and flexibility imbalances can occur between the outer hip muscles and the groin muscles. Exercises can promote internal hip rotation to correct these imbalances.
Peristalsis. Peristalsis is the process of involuntary wave-like successive muscular contractions by which food is moved through the digestive tract. The large, hollow organs of the digestive system contain muscle that enables their walls to move. The movement of organ walls can propel food and liquid and also can mix the contents within each organ. Typical movement of the esophagus, stomach, and intestine is called peristalsis. The action of peristalsis looks like an ocean wave moving through the muscle. The muscle of the organ produces a narrowing and then propels the narrowed portion slowly down the length of the organ. These waves of narrowing push the food and fluid in front of them through each hollow organ. See also borborygmus. The process of peristalsis is used by peristaltic pumps.