The orifice that connects the mouth to the exterior of the body. [ https://github.com/obophenotype/uberon/wiki/The-digestive-tract ]
The orifice that connects the mouth to the exterior of the body.
oral part of face
(...) mouth development is very similar in protostomes and 'basal' deuterostomes, whereas the chordate mouth seems to develop at a new position. Recent data for echinoderms and hemichordates further suggest that this change in mouth position may result from change in the influence of a conserved ectodermal patterning system on mouth development. It has been suggested that the mouths of vertebrates and urochordates may constitute a 'new' mouth.[well established][VHOG]