Darkfield micrograph of human scalp section.

Image courtesy of Anita L. Tellier, Rochester Institute of Technology.

A confocal micrograph of blood vessel networks in the intestine of an adult mouse.

Image courtesy of Satu Paavonsalo and Sinem Karaman, University of Helsinki.

A fluorescent micrograph of a section of small intestine of a mouse. The finger-like projections are villi, which line the intestinal tract and increase surface area for absorption.

Image courtesy of Amy Engevik, Medical University of South Carolina.

An optical projection tomograph depicts the lung of a 16 ½ day old embryonic mouse, with airways highlighted in pink and epithelial progenitors in green.

Image courtesy of Kamryn Gerner-Mauro and Jichao Chen at University of Texas MD Anderson Cancer Center.

A trichinella cyst is depicted in pork muscle. Trichinella is a parasitic worm known to cause trichinosis, an intestinal infection that, untreated, can progress to serious inflammation of the heart and lungs.

Image courtesy of Nathan P. Myhrvold, Modernist Cuisine.

A micrograph using confocal, fluorescence and image stacking technologies depicts the optic nerve head of a rodent. Astrocytes in yellow, contractile proteins in red and vasculature in green.

Image courtesy of Hassanin Qambari and Jayden Dickson, Lions Eye Institute, Australia.

A darkfield image of a mammal heart.

Image courtesy of Hillary Guzik, Rochester Institute of Technology.

Purkinje neurons are located in the cerebellar cortex of the brain. With their flask-shaped cell bodies, many branching dendrites and a single long axon, these cells are essential for controlling motor activity.

Image courtesy of Thomas Deerinck, NCMIR, UC San Diego.

The developing nervous system in the eye of a 7-day-old chick embryo.

Image courtesy of Elkhan Yusifov and Martina Schaettin, University of Zurich/Nikon Small World.

The abdominal skin of a tick engorged with blood. The ridged construction of the skin allows feeding ticks to expand up to 100 times their body weight.

Image courtesy of Theo Theune, Oost-Souberg, Zeeland, The Netherlands/Nikon Small World.