organ morphological measurement gastrointestinal tract morphological measurement 2019-01-22T15:53:54Z CMO:0003015 Measurement of the morphological characteristics of the gastrointestinal tract. The gastrointestinal tract 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. clinical_measurement_ontology sjwang