develops from develops from existence ends during channel for channels_from channels_into post-juvenile adult stage esophagus milk anatomical conduit abomasum ruminant reticulum ruminant esophageal groove BTO:0004789 esophageal groove reticular groove ruminant reticular groove The formation of the esophageal groove is controlled by neural stimulation from suckling and milk proteins. This means milk, colostrum, and milk replacer bypass the rumen, while water enters it. This is modelled as the structure itself, rather that the space of the groove, see https://github.com/obophenotype/uberon/pull/2691 for more information. UBERON:0010229 SCTID:86149002 A muscular structure at the lower end of the esophagus that, when closed, forms a tube allowing milk to go directly into the abomasum. (This prevents milk from being fermented or soured by the ruminal microorganisms).