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Internal thoracic artery
In human anatomy, the internal thoracic artery (ITA), previously known as the internal mammary artery (a name still common among surgeons), is an artery that supplies the anterior chest wall and the breasts. It is a paired artery, with one running along each side of the sternum, to continue after its bifurcation as the superior epigastric and musculophrenic arteries.
==Structure==
The internal thoracic artery arises from the subclavian artery near its origin.
It travels downward on the inside of the ribcage, approximately a centimeter from the sides of the sternum, and thus medial to the nipple. It is accompanied by the internal thoracic vein.
It runs deep to the internal intercostal muscles, but superficial to the transverse thoracic muscles.
It continues downward until it divides into the musculophrenic artery and the superior epigastric artery around the sixth intercostal space.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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