Axillary Artery - Branches
First part Superior thoracic artery: Supplies blood to the pectoralis minor and major muscles. Second part Thoracoacromial artery: Divides into several branches, including the acromial, pectoral, clavicular, and deltoid arteries. Lateral thoracic artery: Supplies the pectoral muscles, serratus anterior, and the mammary gland.