File:Anderson2016-fig09a.jpg

Fig. 9. The images are prepared from a human heart at Carnegie stage 14 using high resolution episcopic microscopy. The left hand panel shows a section through the atrioventricular (AV) canal, which is supported exclusively above the cavity of the developing left ventricle. Note again the parallel expansion of the atrial appendages from the atrial component of the tube (white arrows with black borders), while the apical components of the ventricles are developing in series. As is shown in the right hand panel, from the same heart but sectioned so as to show the apical part of the developing right ventricle (RV), the outflow tract is supported by the developing right ventricular chamber.