Dermal denticles on a Dogfish shark {Scyliorhinus sp}. These tooth-like structures on the skin of sharks and rays afford protection from predators and ectoparasites. They are also speculated to reduce drag whilst swimming. False coloured scanning electron micrograph. Dead specimen.
Two cervical cancer cells divide in this image from a scanning electron microscope.
Two cervical cancer cells divide in this image from a scanning electron microscope.
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