ANATOMY

Detailed explanation-1: -Peristalsis is the wave of constriction caused by the circular muscles of gut pushing the food along.

Detailed explanation-2: -Peristalsis is a series of muscle contractions. These contractions occur in your digestive tract. Peristalsis is also seen in the tubes that connect the kidneys to the bladder. Peristalsis is an automatic and important process.

Detailed explanation-3: -After passage through the esophagus, the bolus will enter the stomach and undergo mechanical and chemical digestion. Mechanical digestion in the stomach occurs via peristaltic contractions of the smooth muscle from the fundus towards the contracted pylorus, termed propulsion.

Detailed explanation-4: -Two types of motor activity have been recognized: segmenting contractions and peristaltic contractions. The predominant motor action of the small intestine is the segmenting contraction, which is a localized circumferential contraction, principally of the circular muscle of the intestinal wall.

Detailed explanation-5: -The food moves down the oesophagus due to muscular movements in its wall.