A "tube" is normally defined as having two openings, one at each end.
They have two.
prietika
tracheal system
tracheal system
From the esophagus to the anus, the digestive is basically a tube very similar to other tubular organs in the body. All such tubular organs are composed of several tissue layers arranged around a lumen. In a "generic" tubular organ, these layers are as follows (from the lumen to the ablumenal layer).
The part that connects the mouth to the digestive tube is called the pharynx.
The digestive track is a long twisting tube from the mouth to the
has only a single openning
The pharynx, also known as the throat, is a tube used by both the digestive and respiratory systems.
well it has a tube, and that tube is within a tube. therefore, the tube is somehow within the tube. that explains it
The Esophagus
a long continuous tube