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Definition of Aortic arch
1. Noun. The part of the aorta that arches and turns downward.
Medical Definition of Aortic arch
1. The curved portion between the ascending and descending parts of the aorta; it begins as a continuation of the ascending aorta posterior to the sternal angle, runs posteriorly and slightly to the left as it passes over the root of the left lung, and becomes the descending aorta as it reaches and begins to course along the vertebral column; it gives rise to the brachiocephalic trunk, the left common carotid and left subclavian arteries. Any member of the several pairs of arterial channels encircling the embryonic pharynx in the mesenchyme of the brachial arches; there are potentially six pairs, but in mammals the fifth pair is poorly developed or absent. The first and second pairs are functional only in very young embryos; the third pair is involved in the formation of the carotids; the fourth arch on the left is incorporated in the arch of the aorta; the sixth pair forms the proximal part of the pulmonary arteries. A series of arterial channels encircling the embryonic pharynx in the mesenchyme of the branchial arch's. There are potentially six pairs, but in mammals the fifth pair is poorly developed or absent. The first and second pairs are functional only in very young embryos; the third pair is involved in the formation of the carotids; the fourth arch on the left is incorporated in the arch of the aorta; the sixth pair forms the proximal part of the pulmonary arteries. Synonym: arcus aortae. (05 Mar 2000)
Lexicographical Neighbors of Aortic Arch
Literary usage of Aortic arch
Below you will find example usage of this term as found in modern and/or classical literature:
1. Anatomy: Descriptive and Surgical by Henry Gray (1897)
"... on the right side which forms the aortic arch ; while in reptiles the fourth
arch on both sides persists, as there is a permanent double aortic arch. ..."
2. Encyclopaedia Britannica, a Dictionary of Arts, Sciences, Literature and edited by Hugh Chisholm (1910)
"The fused part of the two ventral aortae. just in front of the heart, forms the
ascending part of the adult aortic arch, and where this trunk divides ..."
3. The Medical Clinics of North America by Richard J. Havel, K. Patrick Ober (1919)
"Syphilis, Lesion of aortic arch, Probably Syphilitic; Healed Ulcer of Stomach or
Duodenum. April 9, 1919. CASE I—CHRONIC PULMONARY TUBERCULOSIS AND ..."
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