Scanning electron micrograph of human hair. The image illustrates the size and distensibility of human hair.

Colorized scanning electron micrograph showing the erythrocytes (red blood cells) within the capillary network of an alveola. The alveolar-capillary barrier (or membrane, or blood-air barrier) exists...

Scanning electron micrograph of newborn spore of bacillus thuringiensis. Bacillus thuringiensis is a gram positive soil dwelling bacterio, This Spore kurstaki strain H1 has just emerged from vegetati...

Tentacle of Portuguese Man o' War, Physalia physalis imaged with a stereomicroscope at 30x. Notorious for its painful, powerful sting, the Portuguese Man o' War has a gas filled floating chamber that ...

Time-lapse movie a human tumor fragment grown in collagen I that was freed and reembedded in Matrigel. Images collected every 15 minutes and bar is 50 microns. CIL 42162 - CIL 42165 are related movi...

Hydra, a simple fresh-water animal possessing radial symmetry, imaged in darkfield. Biologists are interested in hydras because of their regenerative ability, and their apparent inability to age or d...

Scanning electron micrograph of the lumenal surface of the toad bladder shows the boundaries of four polygonal squamous epithelial cells surrounding a mitochondrial-rich cell bearing short globular mi...

Scanning electron micrograph of the epidermal surface of the Pacific coho salmon. Ridge-like folds of the plasmalemma, called microplicae, display a labyrinth pattern across the surface, and a circum...

The final stages of cell division is captured in the scanning electron micrograph. Two daughter cells are still interconnected by slender strands of membrane (white arrow at center of image). Lamell...

Scanning electron micrograph of a migratory mouse bone-marrow-derived fibroblast. This cell was found amidst a colony of NPC (Niemann-Pick Disease type C) mutant mouse mesenchymal stem cells isolated ...