<P> The gastrointestinal tract ( digestive tract , digestional tract , GI tract , GIT , gut , or alimentary canal ) is an organ system within humans and other animals which takes in food , digests it to extract and absorb energy and nutrients , and expels the remaining waste as feces . The mouth , esophagus , stomach , and intestines are part of the gastrointestinal tract . Gastrointestinal is an adjective meaning of or pertaining to the stomach and intestines . A tract is a collection of related anatomic structures or a series of connected body organs . </P>
<P> The gastrointestinal tract ( digestive tract , digestional tract , GI tract , GIT , gut , or alimentary canal ) is an organ system within humans and other animals which takes in food , digests it to extract and absorb energy and nutrients , and expels the remaining waste as feces . The mouth , esophagus , stomach , and intestines are part of the gastrointestinal tract . Gastrointestinal is an adjective meaning of or pertaining to the stomach and intestines . A tract is a collection of related anatomic structures or a series of connected body organs . </P>
what are the main purposes of the gastrointestinal
what are the main purposes of the gastrointestinal
takes in food , digests it to extract and absorb energy and nutrients , and expels the remaining waste as feces
takes in food , digests it to extract and absorb energy and nutrients , and expels the remaining waste as feces