THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract. It starts in the esophagus where strong wave-like motions of the smooth muscle move balls of swallowed food to the stomach.

Detailed explanation-2: -Waves of muscle contractions called peristalsis (pronounced: per-uh-STALL-sus) force food down through the esophagus to the stomach. A person normally isn’t aware of the movements of the esophagus, stomach, and intestine that take place as food passes through the digestive tract.

Detailed explanation-3: -Once inside your esophagus, waves of muscular contractions (peristalsis) push the food downward. The food passes through your diaphragm and reaches your lower esophagus. At the opening of your lower esophagus, there’s another ring-shaped muscle called the lower esophageal sphincter (LES).

Detailed explanation-4: -Once food has entered the esophagus, it doesn’t just drop right into your stomach. Instead, muscles in the walls of the esophagus move in a wavy way to slowly squeeze the food through the esophagus.