FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

anterior ejaculatory duct

ID (Ontology)

FBbt:00004967 (Fly Anatomy)

Definition

Duct that connects the vasa deferentia and accessory glands to the ejaculatory bulb in the male adult genitalia. It is 1.2mm long with an anterior dilated portion with a diameter of 120 micrometers, tapering to a narrow tube of 20 micrometers in diameter which enter the ejaculatory bulb. In the abdomen, it extends dorsally, then curves downward and to the left and loops over the rectum to the right side of segment 5 or 6. The duct wall consists of a single thick layer of epithelial cells lined with a thin chitinous intima surrounded by an inconspicuous outer sheath.[ FlyBase:FBrf0007735 ]

Comment

Links to External Ontologies

Annotations

Records annotated with this term OR any of its CHILD TERMS

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Direct annotations: records annotated with this exact term (child terms are NOT included)

Data Class	Field	Direct annotations
Alleles (FBal)	PHENOTYPE_MANIFEST_IN
Insertions (FBti)	EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)	PHENOTYPE_MANIFEST_IN

Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records

Full annotation statements	Relevant FlyBase reports
Full annotation statements	Alleles	Genes	Images	Insertions
anterior ejaculatory duct (all annotations which use CV term, excluding "NOT" statements)

Spanning Tree (Parents/Children)

ejaculatory duct
 |__ejaculatory duct epithelium______
male organism                        |
 |__male-specific anatomical entity__|
epithelium                           |
 |__ejaculatory duct epithelium______|
epithelial tube                      |
 |__duct_____________________________|
anatomical entity                    |
 |__male-specific anatomical entity__|
                                     anterior ejaculatory duct  11 rec.

Spanning Tree View Settings
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Relationships
Is a	male-specific anatomical entity ejaculatory duct epithelium duct
Part of
Synonyms & Secondary IDs
Synonyms

Secondary IDs

External Crossreferences & Linkouts