The =bronchial= and =œsophageal= arteries often arise separately.
Ten pairs of =intercostal arteries= usually arise from the aorta. The
other three come from the subcostal artery.
The two =phrenic arteries= are very variable in origin. They may come
from the aorta, the cœliac, left ruminal, or an intercostal or lumbar
artery.