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Arachnid Characteristics refer to the defining features and traits exhibited by members of the arachnid class, which includes spiders, scorpions, ticks, and mites. These characteristics typically include bodies divided into two segments, eight legs, simple eyes, chelicerae (fangs) for feeding, and pedipalps used for sensory perception and reproduction. Arachnids also possess exoskeletons, respiratory systems that involve book lungs or tracheae, and produce silk for various purposes such as web-building or egg sacs. Additionally, many arachnids are venomous and use their toxins for predation or defense.