In case of occlusion occurs at the 2nd pa of Axillary aery, blood flow is maintained by collateral/ anastomosis between:

C i.e., Deep branch of the transverse cervical aery and subscapular aeryAxillary aery is a continuation of subclan aery from lateral border of 1st rib to lateral border of teres major muscle(2 after which it becomes brachial aery. Because of extensive collateral circulation between thyrocervical trunk of subclan aery and subscapular aery, which is branch distal axillary aery. Ligation, thrombosis or trauma of axillary aery anywhere between origins of thyrocervical trunk & sub scapular aeries will not lead to compromise of flow to distal arm.