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Category:GO:0035202 ! sac formation, open tracheal system
name: sac formation, open tracheal system
namespace: biological_process
def: "Formation of the tracheal sacs, the first tube-like structures to form in the open tracheal system. Once cells are determined to their tracheal cell fate, the tracheal sacs arise by invagination of each ectodermal cluster of tracheal placode cells, between 5 and 7 hours after egg laying. An example of this is found in Drosophila melanogaster." [GOC:mtg_sensu, PMID:11063940, PMID:11992723, PMID:14570584]
synonym: "tracheal placode invagination" RELATED []
synonym: "tracheal sac formation" EXACT []
is_a: GO:0048646 ! anatomical structure formation involved in morphogenesis
relationship:part_of: GO:0007424 ! open tracheal system development
AmiGO
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