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Arachnids are arthropods in the class Arachnida (/ ə ˈ r æ k n ɪ d ə /) of the subphylum Chelicerata. Arachnida includes, among others, spiders , scorpions , ticks , mites , pseudoscorpions , harvestmen , camel spiders , whip spiders and vinegaroons .
The arthropods are a phylum of animals with jointed legs; they include the insects, arachnids such as spiders, myriapods, and crustaceans. [1] Insects play many roles in culture including their direct use as food, [2] in medicine, [3] for dyestuffs, [4] and in science, where the common fruit fly Drosophila melanogaster serves as a model organism for work in genetics and developmental biology.
Some arachnids may be used for human consumption (edible arachnids), either whole or as an ingredient in processed food products such as cheese (Milbenkäse). [1] Arachnids include spiders , scorpions , and mites (including ticks ).
Despite the name, shellfish are not fish. [2] Most shellfish are low on the food chain and eat a diet composed primarily of phytoplankton and zooplankton. [3] Many varieties of shellfish, and crustaceans in particular, are actually closely related to insects and arachnids; crustaceans make up one of the main subphyla of the phylum Arthropoda.
In general, arthropods have mouthparts for cutting, chewing, piercing, sucking, shredding, siphoning, and filtering. This article outlines the basic elements of four arthropod groups: insects, myriapods, crustaceans and chelicerates. Insects are used as the model, with the novel mouthparts of the other groups introduced in turn.
Like the human consumption of insects (anthropo-entomophagy), arachnids as well as myriapods also have a history of traditional consumption, either as food or medicine. Arachnids include spiders, scorpions and mites (including ticks) that are consumed by humans worldwide. [3] Fried spider, primarily tarantula species, is a regional snack in ...
Humans also unintentionally eat arthropods in other foods, [148] and food safety regulations lay down acceptable contamination levels for different kinds of food material. [ Note 4 ] [ Note 5 ] The intentional cultivation of arthropods and other small animals for human food, referred to as minilivestock , is now emerging in animal husbandry as ...
Scorpions, like other arachnids, digest their food externally. The chelicerae, which are very sharp, are used to pull small amounts of food off the prey item into a pre-oral cavity below the chelicerae and carapace. The digestive juices from the gut are egested onto the food, and the digested food is then sucked into the gut in liquid form.