Caudal humeral circumflex artery

Lateral view, left side

The caudal humeral circumflex artery is a branch of the subscapular artery. It gets its name from the fact that it passes around the caudal side of the humerus. It forms collateral circulation with the cranial humeral circumflex artery in the lateral region of the arm. In the cat it serves the lateral and long heads of the triceps, acromiodeltoid, and spinodeltoid. In humans it serves the deltoid muscle and the shoulder joint.