| hypogastric plexus | A complex network of nerve fibres in the pelvic region. The hypogastric plexus distributes sympathetic fibres from the lumbar paravertebral ganglia and the aortic plexus, parasympathetic fibres from the pelvic nerve, and visceral afferents. The bilateral pelvic plexus is in its lateral extent. (12 Dec 1998) |
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| solar plexus | coeliac (nervous) plexus |
| spermatic plexus | The autonomic plexus derived from the aortic plexus and accompanying the testicular artery. Synonym: plexus testicularis, spermatic plexus. (05 Mar 2000) |
| splenic plexus | The plexus of autonomic nerves along the splenic artery. Synonym: plexus lienalis, plexus splenicus. (05 Mar 2000) |
| Stensen's plexus | The venous network surrounding the parotid (Stensen's) duct. (05 Mar 2000) |
| nerve plexus | A plexus formed by the interlacing of nerves by means of numerous communicating branches. Synonym: plexus nervosus. (05 Mar 2000) |
| stroma plexus | A plexus of nerves in the parenchyma of the cornea consisting of the primary or deep plexus, in the substance of the cornea, and the subbasal or superficial plexus just beneath the anterior limiting membrane. (05 Mar 2000) |
| subclavian periarterial plexus | The autonomic plexus accompanying the artery of this name, formed by fibres from the stellate ganglion, and giving off secondary plexus's along the branches of the subclavian. Synonym: plexus subclavius, subclavian plexus. (05 Mar 2000) |
| subclavian plexus | The autonomic plexus accompanying the artery of this name, formed by fibres from the stellate ganglion, and giving off secondary plexus's along the branches of the subclavian. Synonym: plexus subclavius, subclavian plexus. (05 Mar 2000) |
| submucosal plexus | A gangliated plexus of unmyelinated nerve fibres, derived chiefly from the superior mesenteric plexus, ramifying in the intestinal submucosa. Synonym: plexus submucosus, Meissner's plexus, Remak's plexus. (05 Mar 2000) |
| submucous plexus | One of two ganglionated neural networks which together form the enteric nervous system. The submucous (meissner's) plexus is in the connective tissue of the submucosa. Its neurons innervate the epithelium, blood vessels, endocrine cells, other submucosal ganglia, and myenteric ganglia, and play an important role in regulating ion and water transport. (12 Dec 1998) |
| suboccipital venous plexus | The extensive plexus of veins in the suboccipital region. Synonym: plexus venosus suboccipitalis. (05 Mar 2000) |
| subserous plexus | The subserous part of the enteric plexus of autonomic nerves. Synonym: plexus subserosus. (05 Mar 2000) |
| superficial cardiac plexus | The superficial and smaller subdivision of the cardiac plexus, formed by the left superior cardiac nerves from the left vagus and cervical sympathetic trunk; it is found beneath the aortic arch, between the arch and the bifurcation of the pulmonary trunk. Synonym: plexus cardiacus superficialis. (05 Mar 2000) |
| superficial temporal plexus | An autonomic plexus of nerves on the artery of this name, derived from the external carotid plexus. Synonym: plexus temporalis superficialis. (05 Mar 2000) |