Term Name:	secondary branching, open tracheal system
Synonyms:	secondary tracheal branching
Definition:	Sprouting of secondary branches in an open tracheal system. These form from the tips of primary branches and are formed by individual cells that roll up into unicellular tubes. An example of this is found in Drosophila melanogaster.
Ontology:	GO: Biological Process [GO:0007429]    QuickGO    AmiGO