part_of part of part of site anatomical space Original definition: "Non-material anatomical entity of three dimensions, that is generated by morphogenetic or other physiologic processes; is surrounded by one or more anatomical structures; contains one or more organism substances or anatomical structures." The last clause. "contains one or more organism substances or anatomical structures" was dropped from the definition because it was an unnecessary restriction. CARO:0000005 An Immaterial anatomical entity of three dimensions, that is generated by morphogenetic or other physiologic processes and that is bounded by an anatomical surface. immaterial anatomical entity anatomical line anatomical point anatomical surface organism