The dorsal/ventral axis is defined in chick embryos by the orientation of the cells with respect to the yolk.
Halifax Regional Municipality | Larissa (regional unit) | Swiss inventory of cultural property of national and regional significance | Regional Railways | regional rail | Chania (regional unit) | regional theatre | Namibian local and regional elections, 2010 | Trikala (regional unit) | regional | Regional Express Airlines | Regional-Express | regional airline | Peace River Regional District | Kastoria (regional unit) | Auckland Regional Council | Rethymno (regional unit) | Regional theater in the United States | Regional Council | Regional at Best | Kurdistan Regional Government | Cariboo Regional District | Thompson-Nicola Regional District | Regional Municipality of Waterloo | Regional Municipality of Niagara | Regional District of Bulkley-Nechako | Caniapiscau Regional County Municipality | Appalachian Regional Commission | Wittman Regional Airport | Schechter Regional High School |