location_of organism substance anatomical space anatomical cavity Anatomical space which contains portions of one or more body substances and is bounded by the internal surface of one maximally connected anatomical structure. Examples: cranial cavity, pharyngeal recess space, nasal cavity, tooth socket, cavity of serous sac, lumen of stomach, lumen of artery, fornix of vagina. FMA:67552 MA:0002447 UBERON:0002553 cavity galen:Cavity uberon