File:Anderson2016-fig08a.jpg

Fig. 8a. Mouse E10.5 Developing Heart Tube

The cut shown in Panel A, prepared from a mouse at E10.5, is taken through the atrioventricular canal, which opens exclusively to the apical part of the left ventricle, which is ballooning from the inlet part of the ventricular loop (long white arrow). The venous tributaries now open to the right side of the initially common atrium. The primary atrial septum can now be seen growing downwards from the atrial roof. The bracket shows the right side of the atrioventricular junction. There is no direct access from the right atrium to the developing right ventricle. Blood entering the right atrium must pass through the atrioventricular canal, and the interventricular foramen (double headed white arrow) so as to enter the cavity of the developing right ventricle.

Panel B is taken from another mouse embryo at E10.5. As had been shown in panel A, the atrioventricular canal (inlet) opens exclusively to the developing left ventricle (LV).

The cut in Panel B also shows that the outflow tract (outlet) is supported exclusively by the developing right ventricle (RV). Note that the muscular ventricular septum is developing between the ballooning apical components of the two ventricles. So as to reach the outflow tract, all the atrial blood must pass through the embryonic interventricular foramen, which is bounded cranially by the inner heart curvature, and caudally by the muscular ventricular septum.

Figure Links: 1 Heart tube mouse E8 | 2 Ventricular loop mouse E8 | 3 Heart mouse E10.5 | 4 Atrial component mouse E10.5 | 5 Sinus horns mouse E8.5 | 6 Venous valve mouse E10.5 | 7a Left atrium CS14 | 7b Atrioventricular canal CS14 | 8a Atrioventricular canal mouse E10.5 | 8b Outflow tract mouse E10.5 | 9a Atrioventricular canal CS14 | 9b Right ventricle CS14 | 10 Ventricular septal defect | fig 11a | fig 11b | fig 12a | fig 12b | fig 13a | fig 13b | fig 14 | fig 15a | fig 15b | fig 16a | fig 16b | fig 17a | fig 17b | fig 18 | fig 19 | fig 20 | fig 21 | fig 22 | fig 23 | fig 24a | fig 24b | fig 25a | fig 25b |fig 26a | fig 26b | fig 27a | fig 27b | fig 28a | fig 28b | fig 29a | fig 29b | fig 30 | fig 31 | fig 32a | fig 32b | fig 33a | fig 33b | fig 34a | fig 34b | fig 35a | fig 35b | fig 36 | fig 37 | fig 38 | fig 39a | fig 39b | fig 40a | fig 40b | fig 41a | fig 41b | fig 42a | 42b | 43a Stenotic pulmonary valve | 43b Stenotic aortic valve | fig 44a | fig 44b | fig 45a | fig 45b | fig 46a | fig 46b | fig 47 | fig 48 | fig 49 | fig 50a | fig 50b | Figure Gallery

Reference

Anderson RH. Teratogenecity in the setting of cardiac development and maldevelopment. (2016)

Cite this page: Hill, M.A. (2024, April 23) Embryology Anderson2016-fig08a.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Anderson2016-fig08a.jpg

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