subdivision of pelvis perineum http://purl.bioontology.org/ontology/MESH/D010502 http://purl.obolibrary.org/obo/NCIT_C33301 http://purl.obolibrary.org/obo/UBERON_0002356 http://purl.org/sig/ont/fma/fma9579 https://en.wikipedia.org/wiki/Perineum https://www.wikidata.org/wiki/Q105499 Subdivision of trunk proper, which is demarcated from the pelvis by the inferior surface of the pelvic diaphragm and from the lower limbs by the perineofemoral lines; together with the thorax, and abdomen, it constitutes the trunk proper. The body region lying between the genital area and the anus on the surface of the trunk, and to the shallow compartment lying deep to this area that is inferior to the pelvic diaphragm.