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Second Anterior Intercostal Branch of Internal Thoracic Artery (Right)
Cardiovascular System

Second Anterior Intercostal Branch of Internal Thoracic Artery (Right)

Ramus intercostalis anterior secundus arteriae thoracicae internae

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The anterior intercostal branches supplying the upper six intercostal spaces arise from the internal thoracic artery.


As the internal thoracic artery descends in the thorax, it gives off six pairs of anterior intercostal branches. The anterior intercostal branches enter the upper six intercostal spaces, first between the pleura of the lungs and the internal intercostal muscles, then between the internal and innermost intercostal muscles. They extend in the intercostal space to anastomose with the posterior intercostal arteries and their corresponding collateral branches.


The anterior intercostal branches have no named branches.

Supplied Structures

The anterior intercostal branches supply the intercostal and pectoral muscles, the breast, and skin.

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Arteries are vessels transporting blood between heart, tissues, and other organs in order to supply them with nutrition and oxygen.

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