Rib Artery Supply: Understanding Arterial Circulation in the Thorax

Arteries supplying blood to the rib area:

- Posterior intercostal arteries (1st-11th): Branches of the aorta, except for the Supreme intercostal and subcostal arteries

- Anterolateral intercostal arteries (2nd-7th): Branches of the internal thoracic artery (branches of the subclavian artery)

- Musculophrenic arteries (3rd-11th): Branches of internal thoracic artery; pass inferoposteriorly through the thoracic wall at the costal margin

- Pericardiophrenic artery: Branch of internal thoracic artery, supplies lateral thoracic wall and adjacent regions

- Superior epigastric artery: Branch of internal thoracic artery

- Lumbar arteries (4 pairs): Continuation of aorta into abdomen