STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Mouse molars. Coloured scanning electron micrograph (SEM) of mouse (Mus musculus) molar teeth. The teeth are very similar to human teeth. The crown of each molar (white) begins to develop around the 11th day in utero. The root begins to grow from the crown at birth.
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