Head of a young newt, SEM

Head of a young newt, SEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Head of a young newt. Scanning electron micrograph (SEM) of a juvenile (immature) newt. Although this newt is in the last stages of development, it still has gills (frilly structures at top left) on its neck. Gills are specialised organs used for breathing underwater. When tadpoles undergo metamorphosis (developmental changes) into adult newts, their gills change into air-breathing lungs for living on land. Adult newts are mainly terrestrial, only visiting the water to breed.

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Keywords: amphibian, animal, biological, close-up, coloured, detail, developmental biology, eye, eyes, false-colour, false-coloured, fauna, gill, gills, herpetology, immature, juvenile, nature, newt, scanning electron micrograph, scanning electron microscope, sem, underdeveloped, wildlife, young, zoological, zoology

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