What does a hyphen look like? â is a punctuation mark used to join words and to separate syllables of a single word.
Definition of gastrointestinal tract. medical. : the part of the digestive system that consists of the stomach and intestines.
Gastrointestinal physiology is a branch of human physiology addressing the physical function of the gastrointestinal (GI) system.The major processes occurring in the GI system are that of motility, secretion, regulation, digestion and circulation.astrointestinal physiology is a branch of human physiology addressing the physical function of the gastrointestinal (GI) system.