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. Author manuscript; available in PMC: 2011 Sep 20.
Published in final edited form as: Dev Dyn. 2010 Feb;239(2):398–406. doi: 10.1002/dvdy.22161

Figure 8. The aorta forms through the fusion of paired blood vessels that extend along the long axis of the embryo.

Figure 8

Shown are DIC images of a series cross-sections from positions along the posterior-anterior axis of an E9.5 mouse embryo. Sections are arranged in a posterior (A) to anterior (F) direction. Asterisks indicate the lumens of the paired aortae (A–C). Arrow in C shows the cellular septum separating the two aortae. Arrow in D shows a remnant of the cellular septum. Insets in panels B and C show high magnification views of the interface region between fusing dorsal aortae. Inset in panel D shows a high magnification view of the remnant of the cellular septum in the dorsal aorta. Bars equal 50µm.