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25697D

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Image #   25697D
Name:   Orb weaver spider spinneret (Tetragnatha sp.)
Copyright:   Copyright 2008 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Orb weaver spider spinneret (Tetragnatha sp.). Seen in this image are the spinneret piriform gland spigots with silk beginning to be extruded from the spigot tips. Spider spinnerets are organs located on the abdomens of spiders from which spider web silk is extruded. The individual spinnerets move independently yet in a highly coordinated manner to build cocoons or webs. Each spinneret is dotted with many tiny spigots, through which various types and thicknesses of silk are extruded. The strong muscles that move the spinnerets also force liquid silk through the narrow spigots. This pressure, as well as external pulling by the spider, rearranges the liquid silk molecules into a solid but flexible thread. Although spider web silk is only about one millionth of an inch thick, it is considered a natural high-performance polymer. The strength of some silk exceeds that of steel, and its toughness exceeds that of kevlar.
Magnification*: x600
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   25697D arachnids spider Tetragnatha zoom series arachnid arthropod arthropods invertebrate invertebrates Tetragnathidae piriform gland piriform glands silk gland silk glands silk spigot silk spigots Hawaii spider orb weaver orbweaver long-jawed orbweaver long jawed orbweaver longjawed orbweaver SEM 05.01.08 orb weaver spider orbweaver spider piriform spigot piriform spigots silk silk production silk secretion spider silk gland spider silk glands spider spinneret spinneret gossamer gossamer silk

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