Editing Peristalsis (section)

===Stomach===
When a peristaltic wave reaches at the end of the [[esophagus]], the [[cardiac sphincter]] (gastroesophageal sphincter) opens, allowing the passage of bolus into the stomach. The gastroesophageal sphincter normally remains closed and does not allow the stomach's food contents to move back. The churning movements of the stomach's thick muscular wall blend the food thoroughly with the acidic [[gastric juice]], producing a mixture called the [[chyme]]. The [[Muscular layer|muscularis layer]] of the stomach is thickest and maximum peristalsis occurs here. After short intervals, the [[pyloric sphincter]] keeps on opening and closing so the chyme is fed into the intestine in installments.