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.
Food is propelled through your small intestine by peristalsis, which is a wavelike series of muscular contractions. You might recall that peristalsis is also how food moves through your esophagus as it travels from the throat to the stomach. During peristalsis, the longitudinal muscles within the small intestine wall contract, and then the circular muscles contract, pushing the food down the tract. This coordinated contraction of smooth muscle keeps food moving on its one-way path through your digestive system.