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...

Scanning electron microscope image of Strongylocentrotus drobachiensus [sea urchin] at the gastrula stage. Embryo was split open to reveal a nice cross-section through the outer epithelial layer and t...

Yolk syncytial layer cell nuclei exhibit convergence and extension behaviors during late gastrulation. Video made available by Mark Cooper through Zebrafish - The Living Laboratory.

A 3D reconstruction of the cardiac outflow tract (OFT) region (horizontal and vertical rotation) from stage-16 wild-type embryo stained for Ladybird early (Lbe; blue) and Tinman (Tin; red). Heart-anch...

A 3D reconstruction of the cardiac outflow tract (OFT) region (horizontal and vertical rotation) from stage-14 wild-type embryo stained for Tinman (Tin; red) and Msp300 (green). Tin staining reveals t...

Colorized scanning electron micrograph of a lung cancer cell grown in culture.

Dorsal root ganglion nerve cells stained to reveal the microtubules (green) and actin filaments (red). The axon shaft contains bundles of microtubules that give structural support and carry cargo (pro...

Gallbladder wall of a human patient with gallstones. The duct (clear zone at center) is lined by highly polarized epithelial cells with dark nuclei at the base. At the top of the picture, below the...

Gallbladder wall of a human patient with gallstones. The top layer is composed of highly polarized epithelial cells with microvilli partially visible at the apex and dark nuclei at the base. Below ...

Scanning electron micrograph of breast cancer cells that have aggregated.