Axillary aery is divided into 3 pas by pectoralis minor muscle. Axillary aery extends from the outer border of the first rib to inferior border of teres major muscle where it becomes the brachial aery. Branches of the axillary aery: First pa: Superior thoracic aery Second pa: Thoracoacromial aery Lateral thoracic aery Third pa: Subscapular aery Anterior humeral circumflex aery Posterior humeral circumflex aery