| IAD | inactivating dose; instructional advance directive; internal absorbed dose |
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| IAS | immunosuppressive acidic substance; infant apnea syndrome; insulin autoimmune syndrome; interatrial ... |
| ICC | immunocompetent cells; immunocytochemistry; Indian childhood cirrhosis; intensive coronary care; int... |
| IDIC | Internal Dose Information Center |
| IDK | internal derangement of knee |
| artery of the pancreatic tail | Origin, splenic artery near the left gastroepiploic; distribution, the tail of the pancreas; anastomoses, with other pancreatic arteries. Synonym: arteria caudae pancreatis, caudal pancreatic artery. (05 Mar 2000) |
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| artery to atrioventricular node | The atrioventricular branches or the nodal branches, the small arteries supplying the atrioventricular node; they usually arise from the right coronary artery where it starts to descend the posterior interventricular sulcus. Synonym: ramus nodi atrioventricularis, atrioventricular nodal branch, branch to atrioventricular node. (05 Mar 2000) |
| artery to sciatic nerve | <anatomy, nerve> Origin, inferior gluteal; distribution, sciatic nerve; anastomoses, branches of profunda femoris. Synonym: arteria comitans nervi ischiadici, companion artery to sciatic nerve. (05 Mar 2000) |
| artery to the sinuatrial node | Ascending atrial branch, usually (55%) arising from the anterior stem of the right coronary artery (but 35-45% arising from the circumflex branch of the left coronary artery), which runs around the base of the superior vena cava to reach the sinuatrial node. Synonym: ramus nodi sinuatrialis arteriae coronaria dextra, branch to sinuatrial node, sinuatrial nodal branch of right coronary artery, sinuatrial node artery. (05 Mar 2000) |
| artery, vertebral | A key artery located in the back of the neck that carries blood from the heart to the brain. (12 Dec 1998) |
| ascending artery | <anatomy, artery> The branch of the inferior branch of the ileocolic artery that passes superiorly up the ascending colon to communicate with a branch of the right colic artery and supplying the ascending colon. Synonym: arteria ascendens. (05 Mar 2000) |
| ascending branch of the inferior mesenteric artery | <anatomy, artery> Branch of the left colic artery (from inferior mesenteric artery) that passes anteriorly to the left kidney into the transverse mesocolon, where it anastomoses with the middle colic artery. It thus forms an anastomosis between superior and inferior mesenteric arteries, and is a component of the marginal artery (Drummond) of the colon. Synonym: arteria ascendens, arteria intermesenterica. (05 Mar 2000) |
| ascending cervical artery | <anatomy, artery> Origin, usually a terminal branch of the thyrocervical trunk (along with interior thyroid artery); distribution, muscles of neck and spinal cord; anastomoses, branches of vertebral, occipital, ascending pharyngeal, and deep cervical. Synonym: arteria cervicalis ascendens, cervicalis ascendens. (05 Mar 2000) |
| ascending palatine artery | <anatomy, artery> Origin, facial; distribution, lateral walls of pharynx, tonsils, auditory tubes, and soft palate; anastomoses, tonsillar branch of facial, dorsal lingual, and descending palatine. Synonym: arteria palatina ascendens. (05 Mar 2000) |
| ascending pharyngeal artery | <anatomy, artery> Origin, external carotid; distribution, wall of pharynx and soft palate, posterior cranial fossa. Synonym: arteria pharyngea ascendens. (05 Mar 2000) |
| atlantic part of vertebral artery | <anatomy, artery> Suboccipital part of vertebral artery. See: vertebral artery. (05 Mar 2000) |
| auricular branch of occipital artery | <anatomy, artery> Distribution, posterior auricle; anastomosis, posterior auricular artery. Synonym: ramus auricularis arteriae occipitalis. (05 Mar 2000) |
| axillary artery | <anatomy, artery> The continuation of the subclavian artery; it distributes over the upper limb, axilla, chest and shoulder. (12 Dec 1998) |
| azygos artery of vagina | One of two artery's that run longitudinally in the midline on the anterior and posterior aspects of the vagina; they take origin from the uterine artery. (05 Mar 2000) |
| basal part of pulmonary artery | <anatomy, artery> See: right pulmonary artery, left pulmonary artery. (05 Mar 2000) |