Baby Dragon

Credit: Celeste Nelson, Princeton University Art of Science Competition

This is a detail of an immunofluorescence image of the surface of the lung of a bearded dragon embryo (Pogona vitticeps). Nuclei are stained red and the actin cytoskeleton, which helps cell movement, is stained green. The image reveals a nested hierarchy of tubes designed for effective gas exchange, which develops in the embryo even before the animal breathes air.

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livescience.com

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