Dear Editor,
The ingestion and digestion of food is a universal aspect of animal growth and survival and is important for our understanding of obesity and diabetes.All animals have a digestive system that comprises of an upper gastrointestinal tract mainly for the ingestion and storage of food,and a lower gastrointestinal tract or the gut for digestion and absorption.When food is ingested,peristaltic contraction is initiated and directs the bolus through the esophagus toward the stomach or an equivalent structure [1].