Editing Shoulder (section)

=== Blood vessels ===
The subclavian artery arises from the brachiocephalic trunk on the right and directly from the aorta from the left. {{Citation needed|date=November 2016}} This becomes the [[axillary artery]] as it passes beyond the first rib. The axillary artery also supplies blood to the arm, and is one of the major sources of blood to the shoulder region. The other major sources are the [[transverse cervical artery]] and the [[suprascapular artery]], both branches of the [[thyrocervical trunk]] which itself is a branch of the subclavian artery.<ref name=":4" /> The blood vessels form a network (anastamosis) behind the shoulder that helps to supply blood to the arm even when the axillary artery is compromised.<ref name=":4" />
[[File:Text-book of anatomy and physiology for nurses (1913) (14764575614).jpg|thumb|The [[axillary artery]] supplies blood to the arm and is one of the major sources of blood for the shoulder region.]]