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.
Peristalsis. Food is moved through the digestive system by a process called peristalsis. Two sets of muscles in the gut wall are involved: 1  circular muscles-which reduce the diameter of the gut when they contract. 2  longitudinal muscles-which reduce the length of the gut when they contract.