Leukocyte chemotaxis from caudal vein to tailfin wound site. Video made available by Mark Cooper thru The Zebrafish A Living Laboratory.

Scanning electron micrograph of a Drosophila melanogaster sestrin-null mutant. Sestrin-null Drosophila are used to study pathways involved in oxidative stress and aging. Relevant article: Lee, JH ...

This confocal and phase contrast image depicts the chemotactic behaviour of MDA-MB-231 breast cancer cells. The nuclei are labelled blue and the mitochondria are labelled red. The cells are squeezed ...

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 ...

Confocal micrograph of “lost” axons - chick interneurons labeled with green fluorescent protein that were transplanted from older into younger embryos. When they encounter unfamiliar territory, th...

Gallbladder wall of a human patient with gallstones. This low magnification view shows the wall of the diseased gallbladder to have a top layer of highly polarized epithelial cells over a large volu...

Sensory neuron from an adult dorsal root ganglion immunostained for Growth Associated Protein (GAP43) shown in red. Neurites are growing in between stripes containing the EphrinA5 protein (green). Whe...

Colorized scanning electron micrograph of a human embryonic stem cell (gold) growing on a layer of supporting cells (fibroblasts). Stem cells are derived from very early embryos and can either be grow...

Figure 182 from Chapter 5 (Endoplasmic Reticulum) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Electron micrograph of liver from a hamster treated with phenobarbitol for four days. Chronic exposure...