FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
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"
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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       5
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       5
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       1
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       2
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Images Insertions Constructs
 ejaculatory bulb (all annotations which use CV term, excluding "NOT" statements)       5     20      6      6     17
Spanning Tree (Parents/Children)
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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
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Is a male-specific anatomical entity
multicellular structure
Develops from presumptive ejaculatory bulb
Part of ejaculatory duct
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Synonyms
  • "sperm pump" EXACT
Secondary IDs
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