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In some cases, spiders may use silk as a food source. [1] While methods have been developed to collect silk from a spider by force, [2] gathering silk from many spiders is more difficult than from silk-spinning organisms such as silkworms. All spiders produce silk, although some spiders do not make webs. Silk is tied to courtship and mating.
Raspy crickets produce silk to form nests. Honeybee and bumblebee larvae produce silk to strengthen the wax cells in which they pupate. [1] Bulldog ants spin cocoons to protect themselves during pupation. [1] Weaver ants use silk to connect leaves together to make communal nests. [1] Caddisfly larvae produce silk. Webspinners have silk glands ...
Spiders also have several adaptations that distinguish them from other arachnids. All spiders are capable of producing silk of various types, which many species use to build webs to ensnare prey. Most spiders possess venom, which is injected into prey (or defensively, when the spider feels threatened) through the fangs of the chelicerae. Male ...
Spiders produce silk using special organs called spinnerets, located typically on the underside of their abdomen. They look a bit like an icing nozzle and spiders can have a cluster of them which ...
In addition to preserving spiders' anatomy in very fine detail, pieces of amber show spiders mating, killing prey, producing silk and possibly caring for their young. In a few cases, amber has preserved spiders' egg sacs and webs, occasionally with prey attached; [ 93 ] the oldest fossil web found so far is 100 million years old. [ 94 ]
Observations suggesting that there might be silk-producing organs on the feet of the zebra tarantula (Aphonopelma seemanni) led to questions about the origins of spinnerets. It was hypothesised that spinnerets in spiders were originally used as climbing aids on the feet and evolved and were used for webmaking at a later time. [8]
In certain groups of spider species, so-called cribellate spiders, the cribellum is a silk spinning organ. Unlike the usual spinnerets of spiders, the cribellum consists of one or more plates covered in thousands of tiny spigots, tiny holes that hardly project from the surface, in contrast to the elongated spigots that project from spinnerets. [1]
The theory of animal-to-human transplants, known as ... Some also argue that there is a lot that can be done to increase the supply of certain organs, like kidneys, from human sources that wouldn ...