suprarenal plexus suprarenal plexus the suprarenal plexus is formed by branches from the celiac plexus, from the celiac ganglion, and from the phrenic and greater splanchnic nerves, a ganglion being formed at the point of junction with the latter nerve. suprarenal plexusthe celiac ganglia with the sympathetic plexuses of the abdominal viscera radiating from the ganglia. (suprarenal plexus labeled at upper right.)detailsidentifierslatinplexus suprarenalista98a14.3.03.026ta26701fma6635anatomical terms of neuroanatomy the plexus supplies the suprarenal gland, being distributed chiefly to its medullary portion; its branches are remarkable for their large size in comparison with that of the organ they supply.