| 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) |
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| 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 subclavia | <anatomy, artery> Artery arising from the brachiocephalic trunk on the right side and from the arch of the aorta on the left side. It distributes to the neck, thoracic wall, spinal cord, brain, meninges, and upper limb. (12 Dec 1998) |
| 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) |
| arteria suprarenalis inferior | <anatomy, artery> Origin, renal; distribution, suprarenal gland. Synonym: arteria suprarenalis inferior. (05 Mar 2000) |
| arteria suprarenalis media | <anatomy, artery> Origin, aorta; distribution, suprarenal gland. Synonym: arteria suprarenalis media. (05 Mar 2000) |