embryonic/larval tracheal section embryonic/larval ventral tracheal anastomosis FBbt:00000336 Tracheal node that connects the left and right ganglionic branches of an embryonic/larval tracheal metamere. Only 3 pairs of ganglionic branches are joined at the midline by a ventral anastomosis: ganglionic branches 0, 1 and 2. Forms during embryonic stage 16. fly_anatomy.ontology FBbt:00005593 larval ventral anastomosis FBbt:00005594 larval tracheal ventral commissure tracheal node