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...

This image of the vascular system of a chicken embryo taken two days after fertilization is a composite of two different images taken with an upright fluorescent dissecting scope. The egg's shell was...

Nomarski/confocal projection shows animal pole of view of head anlage and underlying movements of yolk syncytial layer (YSL) nuclei (bright spots). Nuclei extend and flow through animal pole region to...

Figure 370 from Chapter 15 (Cytoplasmic Inclusions) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Ectoderm cell from a blastula of Rana pipiens. This cell shows a number of yolk platelets, lipid dro...

Timelapse of dorsal side during gastrulation shows migration of hypoblast and underlying yolk syncytial layer (YSL) nuclei (larger bright spots). The prechordal plate can be seen as a more clumped mas...

Transmission EM showing tight junctions apically and adherens junctions laterally between cells of the enveloping layer of a 24 hr (prim-5) Zebrafish embryo. Specimens fixed in Karnofsky's (overnight...

Patterned nuclei movements in the dorsal yolk syncytial layer( YSL) after mid-gastrulation. Anterior is up. Timelapse includes Nomarski images (left panel), fluorescence (right panel) and overlay (mid...

Zebrafish Notogenesis and Early Neurulation. Mediolateral intercalation produces convergent-extension of the notochordal rudiment. Cells within the center of the notochord elongate and are incorporate...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Cleavage period at the 1.5 hour 16 cell stage. The animal pole is to the top for the early stages, and anterior...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Blastula period at the 3 hour 1000 cell stage. The animal pole is to the top for the early stages, and anterior ...