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The word spider derives from Proto-Germanic *spin-þron-, literally ' spinner ' (a reference to how spiders make their webs), from the Proto-Indo-European root *(s)pen-' to draw, stretch, spin '. [10]
Sep 16, 2024 · spider, (order Araneida or Araneae), any of more than 46,700 species of arachnids that differ from insects in having eight legs rather than six and in having the body divided into two parts rather than three. The use of silk is highly developed among spiders.
Spiders are arachnids, a class of arthropods that also includes scorpions, mites, and ticks. There are more than 45,000 known species of spiders, found in habitats all over the world. There’s a...
There are more than 40,000 described species of spider. They are found all over the world, from the tropics to the Arctic. Spiders are even found living underwater in silken domes they supply with air and on the tops of mountains.
A Spider is any creature in the taxonomic order Araneae. Researchers place all Spiders in the taxonomic class Arachnida, which makes them “arachnids.” However, while all Spiders are arachnids, not all arachnids are Spiders.
The internal anatomy of a spider. Spiders have a two-part body, the front part (cephalothorax) and the abdomen.Unlike insects, spiders do not have antennae.The more advanced spiders have a centralized nervous system, with their ganglia fused into one mass in the cephalothorax. Unlike most arthropods, spiders have no extensor muscles in their limbs, and extend them by hydraulic pressure.
Sep 25, 2019 · Like all arachnids, spiders have just two body regions, a cephalothorax, and an abdomen. These two body regions are joined by a narrow tube at their waist called a pedicel. The abdomen is soft and unsegmented, while the cephalothorax is hard and includes a spider's infamous set of eight legs.
A spider is a carnivorous arthropod (segmented, jointed-limbed animal) of the class Arachnida, order Araneae.About 39 000 species are known of an estimated 170 000 world total. Spiders occur throughout the world excluding Antarctica, inhabiting terrestrial and aquatic environments.
Aug 8, 2002 · Spiders are some of the most successful carnivores in history. Learn how spiders build webs and attack prey and examine cool spider species like jumping spiders.
spider, Any of approximately 42,700 predatory arachnid species, mostly terrestrial, in the order Araneida, abundant worldwide except in Antarctica. Spiders have two main body parts, eight legs, two pincerlike venomous appendages, and three pairs of spinnerets.
