To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 4. Reproduction of the T-reversed type arrangement of Movie S2 by the cell morphology model. The extra-embryonic space and the local contour are crucial geometric constraints regulating cell arrangement Sungrim Seirin-Lee, Kazunori Yamamoto, and Akatsuki Kimura Development 2022. 149:None-None; doi: 10.1242/dev.200401 Download Original Video