They have two.
A "tube" is normally defined as having two openings, one at each end.
prietika
one
Three! Get off here and stop thinking about birds butts
2
Yes.
alomejor no
yes, planarians have one opening in their digestive system
has only a single openning
The digestive track is a long twisting tube from the mouth to the
The Pharynx leads from the mouth to the esophagus and then down to the digestive tract.
The pharynx, also known as the throat, is a tube used by both the digestive and respiratory systems.