Movie 1.

Apical surfaces of neuroepithelial structures in a 2-month-old brain organoid. The movie shows the 3D data of the organoid shown in Fig. 4. Staining was against cell nuclei (Hoechst, cyan) and ZO1 (magenta). The last phase of the movie shows the cropped apical surfaces of the neuroepithelium inside the organoid. The color labeling was randomly generated according to surface area.