aortic arches

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Related to aortic arches: aortic sac

a·or·tic arch·es

a series of arterial channels encircling the embryonic pharynx in the mesenchyme of the pharyngeal 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.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
INTRODUCTION: Variations in the branching pattern of aortic arch are due to variations in the extent of the fusion and absorption of some of the aortic arches into the aortic sac.
Gittenberger-de Groot, "Unique vascular morphology of the fourth aortic arches: possible implications for pathogenesis of type-B aortic arch interruption and anomalous right subclavian artery," Cardiovascular Research, vol.
Although it takes various forms, the common defining feature is that both the left and right aortic arches are present.