Enumerate the two structures passing through quadrangular space of back:

Aru. C. Posterior circumflex humeral artery and Axillary nerve.An-important opening called the quadrangular space is formed by the inferior margin of the teres minor, the shaft of the humerus, the superior margin of teres major and the lateral margin of the long head of the triceps.The axillary nerve and posterior humeral circumflex artery pass through this space.