part of extracellular region female germline ring canal inner rim nurse cell ring canal inner rim GO:0035183 cellular_component ovarian ring canal inner rim See also the fly_anatomy.ontology term 'inner nurse cell ring canal rim ; FBbt:00004881'. A proteinaceous actin-rich layer of the insect ovarian ring canal that forms subcortically to the outer rim. The electron dense inner rim accumulates after the final mitotic division of each germline syncytia, and contains actin, a phosphotyrosine protein, and a number of cytoskeletal proteins. germline ring canal inner rim female germline ring canal cellular anatomical structure