Keywords: Zfish midblastula stage embryo.jpg en This is a cartoon of a zebrafish embryo at sphere stage ~4 hours post fertilization showing the three cell layers that are present in the embryo This is a scanned image of a drawing done by hand by me Celine Santiago Celine Santiago 2008-04-30 Cc-zero Check categories 2010 December 1 en wikipedia Epiboly 1 Danio rerio Blastula |