Spider spinneret, SEM

Spider spinneret, SEM

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Caption: Spider spinneret. Coloured scanning electron micrograph (SEM) of the end of a spider's abdomen showing silk (threads) being produced by a spinneret. Spinnerets produce the silk which spiders use for a wide variety of purposes, such as constructing webs and shelters. Spider's silk is made of a protein polymer called fibroin. It is very elastic and can be stretched 30-40 percent of its length before it breaks. Magnification: x600 when printed 10cm wide.

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Keywords: abdomen, abdominal, anatomical, anatomy, animal, arachnid, arachnology, arthropod, arthropods, biological, biology, close-up, colored, coloured, detail, entomological, entomology, extrude, fauna, fibroin, insects, invertebrate, invertebrates, nature, scanning electron micrograph, scanning electron microscope, sem, silk production, spider, spinneret, strand, strands, web, wildlife, zoological, zoology

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