STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Earthworm head. Coloured scanning electron micrograph (SEM) of the head of a small annelid (segmented) earthworm, showing its mouth, and small clumps of setae (bristles). Magnification: x130 when printed at 10 centimetres wide.
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