FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

ejaculatory bulb

ID (Ontology)

FBbt:00004962 (Fly Anatomy)

Definition

Bilaterally symmetric structure with two anterior and two posterior lateral lobes, a sclerotized rod-like apodeme arising from its upper side and muscles fibers radiating from the end of the rod to the side walls. The anterior ejaculatory duct enters the bulb on the upper side and the posterior ejaculatory duct arises between the paired projections on the opposite side. The walls of the bulb consists of a thick columnar epithelium lined with a well developed intima, enclosing a chamber filled with clear viscous fluid.[ FlyBase:FBrf0007735 FlyBase:FBrf0029539 FlyBase:FBrf0075527 ]

Also Known As

"sperm pump"

Comment

Links to External Ontologies

Annotations

Records annotated with this term OR any of its CHILD TERMS

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Results list data from multiple species. Choose a record type above to open its HitList.

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
Constructs (FBtp)	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	Constructs
ejaculatory bulb (all annotations which use CV term, excluding "NOT" statements)

Spanning Tree (Parents/Children)

adult
 |__ejaculatory duct_________________
male reproductive system             |
 |__ejaculatory duct_________________|
anatomical structure                 |
 |__multicellular structure__________|
male organism                        |
 |__male-specific anatomical entity__|
male-specific anatomical entity      |
 |__ejaculatory duct_________________|
duct                                 |
 |__ejaculatory duct_________________|
anatomical entity                    |
 |__male-specific anatomical entity__|
                                     ejaculatory bulb  73 rec.
                                      |__ejaculatory bulb apodeme 10 rec.
                                      |   |__ejaculatory bulb plate 1 rec.
                                      |__ejaculatory bulb epithelium 12 rec.
                                      |   |__ejaculatory bulb epithelial cell 12 rec.
                                      |__ejaculatory bulb muscle 4 rec.
                                      |   |__ejaculatory bulb muscle cell 4 rec.
                                      |__semen-secreting cell of the ejaculatory bulb

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	male-specific anatomical entity multicellular structure
Develops from	presumptive ejaculatory bulb
Part of	ejaculatory duct
Synonyms & Secondary IDs
Synonyms
	"sperm pump" EXACT
Secondary IDs

External Crossreferences & Linkouts