[physiological activity and functions of the gastrointestinal system as a whole or of any of its parts, including breaking down food, preparing it for absorption and eliminating waste. ( CSP )]
UMLS (CSP) C0516983 Relation/PAR: Physiology
Relation/CHD: deglutition
digestion
salivation
gastrointestinal absorption/transport
gastrointestinal motility/pressure