The gastrointestinal tract is a 30-foot (9 m) tube running from your mouth to your anus.
The digestive system, or gastrointestinal tract, is a roughly 30-foot long tube running from the mouth down to the anus, where fecal matter exits the body.
The gastrointestinal tract is a 30-foot (9 m) tube running from your mouth to your anus.
The digestive system, or gastrointestinal tract, is a roughly 30-foot long tube running from the mouth down to the anus, where fecal matter exits the body.