Answer to Question #232240 in Biology for Ket

Question

Spines that have only the right aortic arch which protrudes from the left side of the heart, while the left arch is reduced, are?

Answer 1

A right aortic arch occurs when the aortic arch traverses over the right bronchus instead of the left bronchus (which defines a left aortic arch). Embryologically, this develops when the right dorsal aorta persists and the left dorsal aorta regresses.