<prompt> The axillary aery is divided into three pas byPectoralis majorPectoralis minorTeres majorTeres minor  <response>: Axillary aery is the continuation of the subclan aery. It extends from the outer border of the first rib to the lower border of the teres major muscle. It continues as the brachial aery. The pectoralis minor muscle crosses it and divides it into three pas. they are - i First pa, superior proximal to the muscle. ii Second pa, posterior or deep to the muscle. iii Third pa, inferior distal to the muscle. Ref : B D Chaurasis Human Anatomy , seventh edition , volume 1 , pg. no., 50 fig. 4.6 