anatomical entity
http://purl.obolibrary.org/obo/CARO_0000000
A part of a cellular organism that is either an immaterial entity or a material entity with granularity above the level of a protein complex. Or, a substance produced by a cellular organism with granularity above the level of a protein complex. [ CAROC:Brownsville2014 ]
Biological entity that is either an individual member of a biological species or constitutes the structural organization of an individual member of a biological species. [ CARO:MAH ]
Term info
Following BFO, material anatomical entities may have immaterial parts (the lumen of your stomach is part of your stomach). The granularity limit follows the limits set by the Gene Ontology on the granularity limit for GO:cellular_component. Note that substances produced by an organism (sweat, feaces, urine) do not need to be part of an organism to qualify as an anatomical structure.
spatial
CARO:0000000
http://purl.obolibrary.org/obo/uberon.owl, http://purl.obolibrary.org/obo/caro.owl, http://purl.obolibrary.org/obo/cl.owl