File:Congdon1922-18.jpg: Revision history

From Embryology

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1 September 2012

  • curprev 16:1716:17, 1 September 2012Z8600021 talk contribs 896 bytes +896 ==Figs. 18 The descent of the fourth aortic arch and the definitive aortic arch into the thorax== Shown in relation to the cervical vertebrae and ribs. Legend * Asterisk - so-called fifth aortic arch * 4 - fourth aortic arch * d. a. - definitive aortic