Which blood vessel is the origin of the axillary artery?

The axillary artery is a major blood vessel that supplies blood to the upper limb and is directly derived from the subclavian artery. It begins at the lateral border of the first rib, where the subclavian artery ends, and continues to its terminal point at the lower border of the teres major muscle, where it transitions into the brachial artery.

Understanding the anatomy and sequence of blood vessels is crucial for recognizing how blood flows through the body. The carotid artery supplies blood to the head and neck, while the radial artery is a branch of the brachial artery that primarily supplies the forearm and hand. The brachial artery is an important artery that follows the axillary artery in the vascular pathway, but it is not the origin of the axillary artery itself. Therefore, the relationship between these arteries confirms that the axillary artery arises from the subclavian artery, making it the correct choice.