FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term adult abdominal spiracle ID (Ontology) FBbt:00004814 (Fly Anatomy)
Definition A spiracle of the adult abdomen. There are 7 pairs of these, in segments A1-7, in the anterior region of the pleural membrane. Each has a rigid circular rim and the opening leads to a tubular atrium lined by inward projecting circular lamellae. Where the atrium joins the trachea, the passage is constricted by a deep fold in the anterior wall which can be closed by the action of an associated spiracular occlusor muscle (FBbt:00013334).[ FlyBase:FBrf0007734 FlyBase:FBrf0034081 ]
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 adult abdominal spiracle (all annotations which use CV term, excluding "NOT" statements)       1      8      1
Spanning Tree (Parents/Children)
Only view relationship: 
abdominal segment
 |__adult abdominal segment__
adult segment                |
 |__adult abdominal segment__|
adult abdomen                |
 |__adult abdominal segment__|
adult tracheal system        |
 |__adult spiracle___________|
adult external abdomen       |
 |__pleural membrane_________|
spiracle                     |
 |__adult spiracle___________|
multicellular structure      |
 |__pleural membrane_________|
                             adult abdominal spiracle  16 rec.
                              |__adult abdominal spiracle 1
                              |__adult abdominal spiracle 2
                              |__adult abdominal spiracle 3 2 rec.
                              |__adult abdominal spiracle 4 2 rec.
                              |__adult abdominal spiracle 5 2 rec.
                              |__adult abdominal spiracle 6 3 rec.
                              |__adult abdominal spiracle 7 10 rec.
                              |__lever of abdominal spiracle
                              |__peritreme of abdominal spiracle
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Is a adult spiracle
Part of adult abdominal segment
pleural membrane
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https://www.ento.csiro.au/biology/drosophila/melanogaster.html?abdominal%20spiracles