tracheal pit [FBbt_00005036]
tracheal pit
ID: FBbt_00005036
Deep and narrow pit formed by the invagination of a tracheal placode in a late extended germ band embryo. Invagination of the placode begins during stage 11. Branches begin to bud from the pit during stage 11, with a dorsal and ventral stem being apparent by mid-stage 12. The pit closes over during stage 13. There are 10 pairs of tracheal pits - one pair in each tracheal metamere (each segment from T2 to A8). Pits are located in the central one third of each parasegment, with the most anterior in parasegment 4 and the most posterior in parasegment 14.
Note, some authors refer to tracheal pits as tracheal sacs. This ontology avoids this nomenclature in order to avoid confusion with terms referring to the tracheal air sacs of the adult.
Open in VFB 3D Browser →Relationships
- develops into: imaginal tracheoblast
- is part of: late extended germ band embryo
Alternative Names
| Synonym | Scope | Reference |
|---|---|---|
| embryonic tracheal pit | exact synonym | |
| tracheal sac | exact synonym | Ebner et al., 2002 |
Parts of tracheal pit (49 total)
| Thumbnail | Name | Tags |
|---|---|---|
| ganglionic tracheal branch primordium | Anatomy | |
| lateral group tracheal branch precursor | Anatomy | |
| tracheal dorsal trunk anterior branch 3 primordium | Anatomy | |
| tracheal lateral trunk posterior branch 8 primordium | Anatomy | |
| tracheal lateral trunk posterior branch 9 primordium | Anatomy |
Subclasses of tracheal pit (11 total)
| Thumbnail | Name | Tags |
|---|---|---|
| abdominal tracheal pit 1 | Anatomy | |
| abdominal tracheal pit 2 | Anatomy | |
| abdominal tracheal pit 3 | Anatomy | |
| mesothoracic tracheal pit | Anatomy | |
| metathoracic tracheal pit | Anatomy |
Expression patterns overlapping tracheal pit (7 total)
| Thumbnail | Name | Tags |
|---|---|---|
| P{GAL4-btl.S} expression pattern | Expression_pattern | |
| P{GAL4-prd.F} expression pattern | Expression_pattern | |
| P{A92}Q26b expression pattern | Expression_pattern | |
| P{lacW}A1-2-54 expression pattern | Expression_pattern | |
| P{ET-L}trh-1-eve-1 expression pattern | Expression_pattern |
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