Gastrointestinal organoids refer to organoids that recapitulate structures of the gastrointestinal tract. The gastrointestinal tract arises from the endoderm, which during development forms a tube that can be divided in three distinct regions, which give rise to, along with other organs, the following sections of the gastrointestinal tract: 
:# The foregut gives rise to the oral cavity and the stomach
:# The midgut gives rise to the small intestines and the ascending colon 
:# The hindgut gives rise to the rectum and the rest of the colon
Organoids have been created for the following structures of the gastrointestinal tract: