surrounds Adjacency relation which holds between each physical anatomical entity of type A and some anatomical entity of the same dimension in type B such that the proximate bona fide boundaries of ?a? and ?b? are adjacent for most of their extent. 85860 Parietal serous membrane Visceral serous membrane Renal fascia Region of peritoneum Mesosalpinx Anatomical structure Spatial association relation Anatomical entity Acellular membrane Region of pleura Region of dura mater Visceral serous pericardium of pulmonary vein Region of cervical fascia Cell component Segment of pericardial sac Portion of neural tissue