Spider spinneret, SEM

Spider spinneret, SEM

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Caption: Spider spinneret, coloured scanning electron micrograph (SEM). This structure, one of several, is found on the tip of a spider's abdomen. It produces the silk which spiders use for a wide variety of purposes, such as safety lines, webs, and shelters. Some spiders also use silk to spin cocoons for their eggs. 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.

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Keywords: 1, abdomen, abdominal, animal, arachnology, biological, biology, close-up, colored, coloured, detail, entomological, entomology, extrude web strands, fauna, fibroin, insect, insect anatomy, nature, one, safety lines, scanning electron micrograph, scanning electron microscope, sem, silk production, single, spider, spinneret, wildlife, zoological, zoology

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