develops from blood vessel mesoderm-derived structure dorsal aorta intersomitic vessel XAO:0004075 EFO:0003664 intersegmental vessel UBERON:0014907 intersomitic blood vessel One of the primary blood vessel sprouts that originate from the dorsal aorta and posterior cardinal vein and align dorsoventrally at the myotomal boundaries between somites. ZFA:0001285 segmental vessel TAO:0001285