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.
Science Main Index. When you swallow food, it doesn't just drop down into your stomach. Muscles contract in a wave-like motion to move the food along through the digestive tract. This muscle movement is called, peristalsis, or peristaltic waves.These peristaltic waves contract behind the food bolus pushing it along the digestive tract.In the small intestine, peristaltic waves not only move food along the intestine, but also mix the food chyme to help in the digestive process.his muscle movement is called, peristalsis, or peristaltic waves. These peristaltic waves contract behind the food bolus pushing it along the digestive tract. In the small intestine, peristaltic waves not only move food along the intestine, but also mix the food chyme to help in the digestive process.