[Biopsy and functional tests of the gastrointestinal mucosa].
D001706:Biopsy; D005750:Gastric Juice / Q000378:metabolism; D005753:Gastric Mucosa / Q000473:pathology* / Q000503:physiopathology; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D006801:Humans; D007408:Intestinal Absorption; D007413:Intestinal Mucosa / Q000473:pathology* / Q000503:physiopathology