Xenbase Image ID: 130083

Fig. 1. Three-dimensional views of normal frog development. Normal embryos from gastrulation stages are presented in mid-sagittal view. Internal events of gastrulation are clearly visible, including blastopore groove formation (A), archenteron formation (B), archenteron elongation (C) and archenteron inflation (D-F). Mesendoderm migration over the blastocoel roof initiates on the dorsal side (A), and spreads laterally (B) and ventrally (C) before meeting at the animal pole. In a corresponding manner, the blastocoel shrinks and shifts ventrally. (G-I) Three embryos with very similar blastopores, but with significantly different degrees of archenteron elongation. bc, blastocoel; ac, animal cap; dbpl, dorsal blastopore lip; cleft, cleft of Brachet; vbpl, ventral blastopore lip; arc, archenteron; mm, mesodermal mantle; v, ventral; d, dorsal. Image published in: Ewald AJ et al. (2004) Copyright © 2004. Image reproduced with permission of the publisher and the copyright holder. This is an Open Access article distributed under the terms of the Creative Commons Attribution License. Larger Image Printer Friendly View

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