| plexus subserosus | The subserous part of the enteric plexus of autonomic nerves. Synonym: plexus subserosus. (05 Mar 2000) |
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| plexus suprarenalis | An autonomic plexus formed mainly by branches from the coeliac ganglion, lying at the hilus of the suprarenal gland. Synonym: plexus suprarenalis. (05 Mar 2000) |
| plexus temporalis superficialis | An autonomic plexus of nerves on the artery of this name, derived from the external carotid plexus. Synonym: plexus temporalis superficialis. (05 Mar 2000) |
| plexus testicularis | The autonomic plexus derived from the aortic plexus and accompanying the testicular artery. Synonym: plexus testicularis, spermatic plexus. (05 Mar 2000) |
| plexus thyroideus impar | A venous plexus in front of the lower portion of the trachea formed by anastomoses between the inferior laryngeal veins and veins emerging from the caudal border of the thyroid; it terminates in the unpaired inferior thyroid vein. (05 Mar 2000) |
| plexus thyroideus inferior | An autonomic plexus on the artery of this name, derived from the subclavian plexus. Synonym: plexus thyroideus inferior. (05 Mar 2000) |
| plexus thyroideus superior | An autonomic plexus on the artery of the same name, derived from the external carotid plexus. Synonym: plexus thyroideus superior. (05 Mar 2000) |
| plexus tympanicus | A plexus on the promontory of the labyrinthine wall of the tympanic cavity, formed by the tympanic nerve, an anastomotic branch of the facial, and sympathetic branches from the internal carotid plexus; it supplies the mucosa of the middle ear, mastoid cells, and auditory (eustachian) tube, and gives off the lesser superficial petrosal nerve to the otic ganglion. Synonym: plexus tympanicus, Jacobson's plexus. (05 Mar 2000) |
| plexus uretericus | The autonomic plexus derived from the coeliac plexus that accompanies the ureter. Synonym: plexus uretericus. (05 Mar 2000) |
| plexus uterovaginalis | A gangliated autonomic plexus on each side of the cervix of the uterus, derived from the inferior hypogastric plexus. Synonym: plexus uterovaginalis, Frankenhauser's ganglion, Lee's ganglion. (05 Mar 2000) |
| plexus vasculosus | A vascular network formed by frequent anastomoses between the blood vessels (arteries or veins) of a part. Synonym: plexus vasculosus. (05 Mar 2000) |
| plexus venosus | A vascular network formed by numerous anastomoses between veins. Synonym: plexus venosus. (05 Mar 2000) |
| plexus venosus areolaris | areolar venous plexus |
| plexus venosus canalis hypoglossi | A small venous network around the hypoglossal nerve, connecting with the occipital sinus, inferior petrosal sinus, and internal jugular vein. Synonym: plexus venosus canalis hypoglossi, circellus venosus hypoglossi, rete canalis hypoglossi. (05 Mar 2000) |
| plexus venosus caroticus internus | A venous network around the internal carotid artery in the carotid canal of the temporal bone, connecting with the cavernous sinus and internal jugular vein. Synonym: plexus venosus caroticus internus, internal carotid (nervous) plexus, plexus caroticus internus. (05 Mar 2000) |
| 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) |