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

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 ...

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...

The JNK phosphatase puckered, whose expression can be reported via a lacZ enhancer trap, is expressed in very low levels in uninjured neurons; however, nerve crush induces a dramatic increase in puc-l...

The JNK phosphatase puckered, whose expression can be reported via a lacZ enhancer trap, is expressed in very low levels in uninjured neurons; however, nerve crush induces a dramatic increase in puc-l...

The JNK phosphatase puckered, whose expression can be reported via a lacZ enhancer trap, is expressed in very low levels in uninjured neurons; however, nerve crush induces a dramatic increase in puc-l...

The JNK phosphatase puckered, whose expression can be reported via a lacZ enhancer trap, is expressed in very low levels in uninjured neurons; however, nerve crush induces a dramatic increase in puc-l...

Fluorescence micrograph of a neuron regenerating in culture. Honorable Mention, 2006 Olympus BioScapes Digital Imaging Competition.

Colorized scanning electron micrograph of partially dried red blood cells clotted on the cotton fibres of a gauze wound dressing. Image was collected at low vacuum to avoid charging of cotton fibres