posterior intercostal arteries 3–11
Definition: nine pairs of arteries arising from the thoracic aorta and distributed to the nine lower intercostal spaces, vertebral column, spinal cord, and muscles and integument of the back; they anastomose with branches of the musculophrenic, internal thoracic, superior epigastric, subcostal and lumbar.
Synonym(s): arteriae intercostales posterioresTA, arteriae intercostales posteriores III–XI
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