alimentary canal
alimentary tract
digestive tube
digestive tract
gastrointestinal tract
GI tract

These parts together are called the alimentary canal (digestive tract).

The various portions of the alimentary canal performed their separate roles in smooth order.

Some research on the alimentary canal also was undertaken, however this work ceased in 1968.

The symptoms which follow this affection of the alimentary canal are exactly what one would expect.

The beetles digestive system is known as an alimentary canal.

So the calendar sessions were the very alimentary canal of the criminal justice system in the Bronx.

It is as if one had somehow entered the alimentary canal of a hippopotamus.

Into this category I would place many of the protozoa in our alimentary canals.

It usually stays in the alimentary canal, but a few organisms make their way into the blood stream.