G. Post scapular branch of the subclavian artery.
H. Transversalis humeri branch of subclavian artery.
I. Transversalis colli branch of subclavian artery.
K. Posterior belly of omo-hyoid muscle, cut.
L. Median nerve branch of brachial plexus.
M. Musculo-spiral branch of same plexus.
N. Anterior scalenus muscle.
O. Cervical plexus giving off the phrenic nerve, which takes tributary branches from brachial plexus of nerves.
P. Upper part of internal jugular vein.
Q. Upper part of internal carotid artery.