| arteria spermatica interna | <anatomy, artery> Origin, aorta; branches, ureteral, cremasteric, epididymal; distribution, testicle and parts designated by names of branches; anastomoses, branches of renal, inferior epigastric, deferential. Synonym: arteria testicularis, arteria spermatica interna, internal spermatic artery. (05 Mar 2000) |
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| arteria sphenopalatina | <anatomy, artery> Origin, third part of maxillary; distribution, posterior portion of lateral nasal wall and septum; anastomoses, branches of descending palatine, superior labial, and infraorbital. Synonym: arteria sphenopalatina. (05 Mar 2000) |
| arteria spinalis anterior | <anatomy, artery> Origin, intracranial part of vertebral; distribution, spinal cord and pia mater; anastomoses, spinal of intercostal and lumbar arteries. Synonym: arteria spinalis anterior. (05 Mar 2000) |
| arteria spinalis posterior | <anatomy, artery> Origin, vertebral; distribution, medulla, spinal cord, and pia mater; anastomoses, spinal branches of intercostal arteries. Synonym: arteria spinalis posterior. (05 Mar 2000) |
| arteria splenica | <anatomy, artery> The largest branch of the coeliac trunk with distribution to the spleen, pancreas, stomach and greater omentum. (12 Dec 1998) |
| arteria stylomastoidea | <anatomy, artery> Origin, posterior auricular; distribution, external acoustic meatus, mastoid cells, saemicircular canals, stapedius muscle, and vestibule; anastomoses, tympanic branches of internal carotid and ascending pharyngeal, and labyrinthine arteries. Synonym: arteria stylomastoidea. (05 Mar 2000) |
| arteria subcostalis | <anatomy, artery> Origin, thoracic aorta; distribution, inferior to twelfth rib in a manner similar to posterior intercostal arteries. Synonym: arteria subcostalis. (05 Mar 2000) |
| arteria sublingualis | <anatomy, artery> Origin, lingual; distribution, extrinsic muscles of tongue, sublingual gland, mucosa of region; anastomoses, the artery of opposite side and submental. Synonym: arteria sublingualis. (05 Mar 2000) |
| arteria submentalis | <anatomy, artery> Origin, facial; distribution, mylohyoid muscle, submandibular and sublingual glands, and structures of lower lip; anastomoses, inferior labial, mental branch of inferior dental and sublingual. Synonym: arteria submentalis. (05 Mar 2000) |
| arteria subscapularis | <anatomy, artery> Origin, axillary; branches, circumflex scapular, thoracodorsal; distribution, muscles of shoulder and scapular region; anastomoses, branches of transverse cervical, suprascapular, lateral thoracic, and intercostals. Synonym: arteria subscapularis. (05 Mar 2000) |
| arteria sulci centralis | <anatomy, artery> A branch of the terminal part of the middle cerebral artery distributed to the cortex on either side of the central sulcus. Synonym: arteria sulci centralis, artery of central sulcus, central artery, Rolandic artery. (05 Mar 2000) |
| arteria sulci postcentralis | <anatomy, artery> A branch of the terminal part of the middle cerebral artery distributing to the cortex on either side of the postcentral sulcus. Synonym: arteria sulci postcentralis, artery of postcentral sulcus, postcentral artery. (05 Mar 2000) |
| arteria sulci precentralis | <anatomy, artery> A branch of the terminal part of the middle cerebral artery distributed to the cortex on either side of the precentral sulcus. Synonym: arteria sulci precentralis, artery of precentral sulcus, pre-Rolandic artery, precentral artery. (05 Mar 2000) |
| arteria supraduodenalis | <anatomy, artery> Origin, gastroduodenal; distribution, first part of duodenum. Synonym: arteria supraduodenalis. (05 Mar 2000) |
| arteria supraorbitalis | <anatomy, artery> Origin, ophthalmic; distribution, frontalis muscle and scalp; anastomoses, branches of the superficial temporal and supratrochlear. Synonym: arteria supraorbitalis. (05 Mar 2000) |