Which artery is primarily responsible for supplying blood to the lower arm?

The brachial artery is primarily responsible for supplying blood to the lower arm as it branches off from the axillary artery and continues down into the arm. As it reaches the elbow, the brachial artery divides into two main arteries: the radial artery and the ulnar artery. These two arteries supply blood to the forearm and hand.

The brachial artery effectively provides the main blood flow necessary for the muscular and tissue demands of the lower arm, making it crucial for both the arm's movement and the overall health of the arm's tissues. Since it is the main vessel before the split into the radial and ulnar arteries, it plays a pivotal role in the vascular supply of the lower arm, reinforcing the importance of understanding its function in anatomy and physiology.