The stomach has a dilated structure and functions as a vital organ in the digestive system. The stomach is involved in the gastric phase of digestion, following the cephalic phase in which the sight and smell of food and the act of chewing are stimuli.:background_color(FFFFFF):format(jpeg)/images/article/en/the-stomach/1j8uT6MmyuqXRJi3cs7YA_Gaster_01.png){kind=logo}
The stomach is an organ of the digestive system, specialized in the accumulation and digestion of food. Its anatomy is quite complex; it consists of four parts, two curvatures and receives its blood supply mainly from the celiac trunk.
Food and fluids enter the stomach from the esophagus by passing through the lower esophageal sphincter. The upper stomach serves as a storage area for food. Here, the cardia and fundus of the stomach relax to accommodate food that enters the stomach.