<P> In adult humans, the stomach has a relaxed, near empty volume of about 75 millilitres . Because it is a distensible organ, it normally expands to hold about one litre of food . The stomach of a newborn human baby will only be able to retain about 30 millilitres . </P> <P> In classical anatomy, the human stomach is divided into four sections, beginning at the gastric cardia, each of which has different cells and functions . </P> <Ul> <Li> The cardia is where the contents of the oesophagus empty into the stomach . The cardia is defined as the region following the "z - line" of the gastroesophageal junction, the point at which the epithelium changes from stratified squamous to columnar . Near the cardia is the lower oesophageal sphincter . Recent research has shown that the cardia is not an anatomically distinct region of the stomach but a region of the oesophageal lining damaged by reflux . </Li> <Li> The fundus (from Latin, "bottom") is formed by the upper curvature of the organ . </Li> <Li> The body is the main, central region . </Li> <Li> The pylorus (from Greek, "gatekeeper") is the lower section of the organ that facilitates emptying the contents into the small intestine . </Li> </Ul> <Li> The cardia is where the contents of the oesophagus empty into the stomach . The cardia is defined as the region following the "z - line" of the gastroesophageal junction, the point at which the epithelium changes from stratified squamous to columnar . Near the cardia is the lower oesophageal sphincter . Recent research has shown that the cardia is not an anatomically distinct region of the stomach but a region of the oesophageal lining damaged by reflux . </Li>

Whats the lower part of your stomach called