Digestive System is a free medical app that lets you explore and study the anatomy of the human digestive system. It features a highly realistic 3D model that can be viewed and rotated 360° in any direction.

It also features multiple layers that allow various viewing options, including X-Ray or changing the background to black or white. You can also zoom in and out of specific organs to study them in more detail, along with their accompanying names and any other relevant information. You can even have the app sound out audio pronunciations for each one.