Housefly. Coloured scanning electron micrograph (SEM, image capture by a TESCAN VEGA) of the head of a common housefly (Musca domestica). The head is dominated by a pair of large compound eyes (red), each eye composed of about 4000 image-forming facets called ommatidia. Mouthparts are visible between and beneath the eyes. Hairs on the head and body act as tactile (touch) organs. The housefly has one pair of wings and six legs. They tend to frequent unsavoury places, feeding on decomposing matter as well as human food, and they may pick up and transmit serious diseases to humans. Magnification: x25 when printed at 10 centimetres wide.
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