<prompt> Aery forming anastomosis around the surgical neck of humerus is a branch of:-1st pa of axillary aery2nd pa of axillary aery3rd pa of axillary aerySubclan aery  <response>: Aeries forming anastomosis around the surgical neck of humerus are anterior circumflex humeral aeries posterior circumflex humeral aeries Both are branches of 3rd pa of axillary aery. 