FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term adult midgut ID (Ontology) FBbt:00003138 (Fly Anatomy)
Definition The middle region of the adult alimentary canal, the epithelium of which is lined with peritrophic membrane rather than chitinous intima as for the foregut and hindgut. The radius along the midgut is not uniform, with 6 major constrictions delimiting 6 regions (R0-R5). The anterior midgut (R1-R2) functions in absorption, the posterior (R4-R5) plays a role in reabsorption, and the middle acidic region (R3), which contains the copper cells (adult cuprophilic cell), in secretion and absorption.[ FlyBase:FBrf0007735 FlyBase:FBrf0208023 FlyBase:FBrf0221749 ]
Also Known As "adult ventriculus"
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Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN     289
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      29
Insertions (FBti)  PHENOTYPE_MANIFEST_IN      27
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN     203
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 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Images Insertions Constructs
 adult midgut (all annotations which use CV term, excluding "NOT" statements)     289     60      6     56    223
     adult midgut | adult stage      12       --       --       --       9
     adult midgut | cell non-autonomous | somatic clone       2       --       --       --       --
     adult midgut | conditional      34       --       --       5     22
     adult midgut | female limited       2       --       --       --       1
     adult midgut | heat sensitive       4       --       --       --       4
     adult midgut | male       2       --       --       --       1
     adult midgut | mated female       2       --       --       --       2
     adult midgut | nutrition conditional       1       --       --       --       --
     adult midgut | pharate adult stage       2       --       --       --       --
     adult midgut | progressive       1       --       --       --       --
     adult midgut | somatic clone      48       --       --       4     30
     adult midgut | somatic clone | conditional       4       --       --       --       2
Spanning Tree (Parents/Children)
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multi-tissue structure__
gut section_____________|
                        midgut
                         |__adult midgut  1725 rec.
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Is a midgut
Develops from midgut imaginal island
Part of adult gut
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