<prompt> Where is the cardiac plexus located?Posterior to the bifurcation of the tracheaAnterior to the bifurcation of the tracheaAnterior to the left hea borderPosterior to the apex of the hea  <response>: Cardiac plexus Plexus of nerves situated at the base of the hea. Formed by cardiac branches derived from both the sympathetic and parasympathetic nervous systems. Divided into : Superficial pa : Lies beneath aoic arch , in front of the right pulmonary aery Deep pa : Situated in front of the tracheal bifurcation above the point of division of the carina and behind the aoic arch. 