What are the main GIT embryological parts?
The developing gastrointestinal tract (GIT) is generally divided into 3 main regions that are continuous with each other: foregut, midgut and hindgut each forming different specific parts of the adult tract. Note that this describes the tract itself, not the associated organs. Note this division can also be shown by the major vascular supply to each region. The foregut commences at the buccopharyngeal membrane (= oral, = stomedeal) as the pharynx and runs down behind the heart, ending at the septum transversum. The midgut continues from the septum transversum and is initially a large ventral cavity in the embryo (continuous with the yolk sac lying outside the embryo) and ends at the lower umbilical region. The hindgut continues down and ends at the cloacal membrane. This region also has a ventral portion, the allantois, that forms a diverticulum into the connecting stalk. Note the foregut and hindgut both later are seperated (septated) into separate regions.
