STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Foetal eye. Coloured scanning electron micrograph (SEM) of a developing eye of an eight week old foetus. The bump within the eye will differentiate into the coloured iris and the black pupil. The eighth week of pregnancy represents the end of the formative developmental stage and the embryo becomes a human-like foetus. By eight weeks the foetus is about 3-4cm long (crown-rump length) and weighs under 10 grams. Magnification unknown.
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