Which artery is a branch of the subclavian artery?

The internal mammary artery is indeed a branch of the subclavian artery. This artery is significant as it supplies blood to the anterior chest wall, including the sternum and the breasts. It branches off from the subclavian artery as it travels inferiorly, running down alongside the sternum.

In contrast, the brachial artery originates from the axillary artery after the subclavian artery transitions to the axillary as it passes the first rib. The radial and ulnar arteries are both branches of the brachial artery, which further emphasize their different origins from the vascular system. Understanding these anatomical relationships is crucial in clinical settings, such as during surgeries or in the assessment of blood supply to various regions.