FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term seminal vesicle ID (Ontology) FBbt:00004958 (Fly Anatomy)
Definition Enlarged distal region of the vas deferens. It connects the testis, via the testicular duct, to the main region of the vas deferens. The seminal vesicles taper into the twisted narrow portions of the vasa deferentia, which in turn opens into the anterior ejaculatory duct.[ FlyBase:FBrf0007735 ]
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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      82
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      10
Insertions (FBti)  PHENOTYPE_MANIFEST_IN      25
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      29
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Relevant FlyBase reports
 Alleles Genes Images Insertions Constructs
 seminal vesicle (all annotations which use CV term, excluding "NOT" statements)      82     24      3     35     43
     seminal vesicle | adult stage       3       --       --       --       1
     seminal vesicle | adult stage | male       1       --       --       --       --
     seminal vesicle | progressive | temperature conditional       1       --       --       --       --
     seminal vesicle | temperature conditional       1       --       --       --       --
Spanning Tree (Parents/Children)
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anatomical structure
 |__multicellular structure__________
ectodermal derivative                |
 |__ventral ectoderm derivative______|
anatomical entity                    |
 |__male-specific anatomical entity__|
                                     seminal vesicle  187 rec.
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Is a ventral ectoderm derivative
male-specific anatomical entity
multicellular structure
Develops from male genital disc
Part of vas deferens
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UBERON:0006868