It took place on the same ground as the First Battle of Bull Run. The battles took place around the city of Manassas, which is in Prince William County, Virginia. These battlâ¦es are also known as the First and Second Manassas.
The involuntary motion that moves food through the alimentary canal is called peristalsis and is a wavelike contraction and relaxation of the intestinal wall smooth muscles. It pushes food along the intestine.
1 This phase takes about 8 seconds and moves food from the pharynx to the stomach. 2  Muscular contractions collectively called peristalsis occur in the walls of the esophagus.  The circular esophageal muscles ahead of the bolus of food relaxes, allowing the digestive tract to expand.