Nerve and glial cells in fruit fly embryo. Glial cells (stained green) in a fruit fly developing embryo have survived thanks to a signaling pathway initiated by neighboring nerve cells (stained red).

Anterior and posterior regions of a C. elegans embryo are determined by PAR protein distribution. PAR-2, shown in green marks the posterior region of the embryo and PAR-6, shown in red, marks the ante...

Anterior and posterior regions of a C. elegans embryo are determined by PAR protein distribution. PAR-2, shown in green marks the posterior region of the embryo and PAR-6, shown in red, marks the ante...

Time series of images of fertilized Xenopus laevis embryos with their vitellin membrane removed. Embryos were incubated plus/minus the actin depolymerizer cytochalsin B.

Time series of images of fertilized Xenopus laevis embryos with their vitellin membrane removed. Embryos were incubated plus/minus the actin depolymerizer cytochalsin B.

Confocal z-stack of a dividing zebrafish embryo. The fixed embryo is visualized using EMTB-3GFP (microtubules-marker - green), phalloidin (actin marker -red) and Hoechst (DNA marker - blue).

4D video of zebrafish embryo mitosis and cytokinesis. This time lapse video of z-series images was taken of a zebrafish embryo expressing EMTB-3XGFP (a microtubule marker) taken shortly after fertil...

A confocal micrograph of a human embryo, with some remaining sperm cells, about five days after fertilization. The nuclei of both the sperm and cells of the embryo are stained purple, the tails of the...

Early ascidian (sea squirt) embryos visualized by differential interface contrast (DIC) microscopy. Ascidians are used as a model for developmental research. Their simple embryonic development is rapi...

Early ascidian (sea squirt) embryos visualized by differential interface contrast (DIC) microscopy. Ascidians are used as a model for developmental research. Their simple embryonic development is rapi...