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Fig. 12. Archenteron inflation by fluid transfer from the blastocoel. (A-D) Cavities
between the blastocoel and the archenteron were visualized with SIM (sagittal
section, A), in cleaved embryos (B), and with MRI (sagittal section of intact
embryo, C). (D) Sagittal view of the SIM dataset from A rendered to visualize
internal spaces, highlighting (red arrowheads) the cavities connecting the
blastocoel and archenteron. (E) Transverse volume render of the SIM dataset
from A. Cavities are highlighted in red in the tracings shown in d' and
e'. An animation of this volume rendering is presented in Movie 8 in
supplementary material.