The aortic arches or pharyngeal arch arteries are a series of six paired embryological vascular structures which give rise to several major arteries. They are ventral to the dorsal aorta and arise from the aortic sac.
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“No annual training or muster of soldiery, no celebration with its scarfs and banners, could import into the town a hundredth part of the annual splendor of our October. We have only to set the trees, or let them stand, and Nature will find the colored drapery,—flags of all her nations, some of whose private signals hardly the botanist can read,—while we walk under the triumphal arches of the elms.”
—Henry David Thoreau (1817–1862)