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Colorized scanning electron micrograph of human lung tissue, depicting alveoli and bronchus. Lung alveoli are tiny, grape-like sacs, numbering in the millions, where essential gas exchange (oxygen/carbon dioxide) occurs. Image courtesy of Dennis Kunkel/SPL.
Institute News

Science in Pictures

A weekly image series featuring selected pictures in science • Human lung tissue

Mar 9, 2026
Colorized scanning electron microscope composition of human sperm traveling through a fallopian tube. Image courtesy of Steve Gschmeissner/Getty.
Institute News

Science in Pictures

A weekly image series featuring selected pictures in science • Human sperm traveling through a fallopian tube

Mar 2, 2026