FB2026_03 , released September 17, 2026
CV Term Report
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Term adult posterior hindgut ID (Ontology) FBbt:00003144 (Fly Anatomy)
Definition Posterior-most region of the adult hindgut. It consists of a broadly expanded rectal sac (rectal ampulla) that tapers posteriorly to the narrow rectum proper, terminating at the anus. Protruding from the walls into the lumen of the rectal sac are two pairs of conical rectal papillae.[ FlyBase:FBrf0007735 ]
Also Known As"adult rectum" ; "posterior intestine"
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
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 adult posterior hindgut (all annotations which use CV term, excluding "NOT" statements)
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hindgut
 |__adult hindgut______________
 |__rectum_____________________|
adult gut                      |
 |__adult hindgut______________|
posterior ectoderm derivative  |
 |__adult hindgut______________|
gut section                    |
 |__rectum_____________________|
                               adult posterior hindgut  31 rec.
                                |__adult posterior hindgut circular muscle cell
                                |   |__adult rectal sphincter cell
                                |__adult posterior hindgut longitudinal muscle cell
                                |__adult rectal sac 17 rec.
                                |   |__adult anus 14 rec.
                                |   |__adult rectal papilla 4 rec.
                                |   |__adult rectal sphincter cell
                                |__adult rectal valve 1 rec.
                                |__female adult posterior hindgut
                                |__male adult posterior hindgut
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Is a rectum
Part of adult hindgut
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