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. 2011 Jul 11;6(7):e22055. doi: 10.1371/journal.pone.0022055

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van den Berg, Moorman.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Also refer to supplemental File S1 for an interactive version of this reconstruction. (1) Ventral view of the heart. Cx40 positive working myocardium is shown in green, primary myocardium is depicted in grey. (2) Dorsal view; the splanchnic plexus is shown in light red and hepatic lumen in brown. (3) Left lateral view. (4) Left lateral view; the surface of the left atrium is cut, showing the atrial septum and the entrance of the pulmonary vein. The endoderm is transparent. (5) The splanchnic plexus is interwoven with the hepatic lumen (6) Within the endoderm several organs are developing. (7) Ventral view showing the sinus venosus region with respect to the splanchnic (blue) and somatic (red) mesoderm (8) Solitary depiction of the splanchnic and the somatic mesoderm. The lateral mesocardium is indicated by a hatched line. (9) The venous systems of the cardiac inflow. (Abbreviations–I, II, III, IV: first, second, third & fourth pharyngeal arch artery, respectively; avc: atrioventricular canal; sup. card.: superior cardinal vein; inf. card. vein: inferior cardinal vein; pulm. vein: pulmonary vein.)