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Arachnids are a class of arthropods with over 100,000 species, including spiders, scorpions, and ticks. They feature a two-part body structure, the cephalothorax and abdomen, and are known for their eight legs, lack of antennae, and various adaptations such as venom and silk production. These creatures play crucial roles in ecosystems as predators, decomposers, and even parasites. Their fascinating biology and diversity make them an essential group for ecological balance and scientific study.
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Arachnids have a chitinous exoskeleton, segmented body, and eight legs
Chelicerae and Pedipalps
Arachnids use chelicerae and pedipalps for feeding, defense, and sensory perception
Respiratory Systems
Arachnids have adapted respiratory systems such as tracheae or book lungs for breathing air
Arachnids have diverse reproductive strategies, including laying eggs or giving birth to live young
Scorpions are nocturnal arachnids with venomous stingers and grasping pedipalps
Spiders exhibit a wide range of behaviors and ecological niches, with many species capable of producing silk
Ticks are ectoparasites that feed on the blood of vertebrates and use a behavior called "questing" to find hosts
Arachnids have two body segments, while insects have three distinct segments
Antennae
Insects have antennae for sensory input, while arachnids have pedipalps that can serve a similar function
Insects undergo complete metamorphosis with four life stages, while arachnids have a three-stage life cycle
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Arachnid vs Insect Distinction
Arachnids have two body segments and eight legs; insects have three segments and six legs.
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Arachnid Habitat Range
Arachnids inhabit all continents except Antarctica, adapting to diverse environments.
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Arachnid Ecological Roles
Arachnids act as predators and decomposers, playing key roles in ecosystem balance.
