The gastrointestinal (GI), or digestive, tract extends from mouth to anus (see the image below). The division of the GI tract into upper and lower is a matter of some confusion and debate.
Gastrointestinal Tract Histology - Gastrointestinal - Medbullets
Ch26 Pt15, Digestive System, Microscopic Anatomy of the Large
The Digestive System I: Gross and Microscopic Anatomy of the Liver
Gross anatomy: systemic anatomy vs regional anatomy
Digestive System: Function, Organs & Anatomy
Anatomy of organs of the digestive system and their functions
Stomach - Knowledge @ AMBOSS
Photograph showing the anatomical view of the gastrointestinal
DigSys A: Gross Anatomy and Histology of GI Tract
Solved Bio 110 Online Anatomy of the Digestive System
Gross and Microscopic Anatomy of the Large Intestine
ANATOMY