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Exploring Arachnids: The Fascinating Chelicerates

Delve into the world of arachnids, a diverse group of chelicerates without mandibles and antennae, featuring unique characteristics like fanglike chelicerae and spinnerets for silk production. Discover their adaptations, functions, and various arachnid groups such as spiders, scorpions, and more.

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Exploring Arachnids: The Fascinating Chelicerates

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  1. Sub - Phylum Chelicerata Class: Arachnida • Arthropods without mandibles and antennae. • Have 6 pairs of appendages: • Including: • 4 Pairs of walking legs • One pair of fanglike mouth parts (chelicerae) • One pair of pedipalps • 2 Body sections: • Cephalothorax • Abdomen

  2. Chelicerates

  3. 1 Cephalothorax 2 Abdomen 6 4 3 9 5 8 555 Fanglike chelicera 5 7

  4. Functions: • Chelicerae – contain fangs used to stab and paralyze prey with venom. • Pedipalps – grab prey • Spinnerets – Organs that contain silk glands, force silk through these. • Book lungs – Used for respiration (O2 enters through the spiracle.

  5. Functions continue: • Malpighian tubules – For excretion of metabolic • wastes. • Chelicerate groups: • Horsehoe crabs • Sea spiders • Arachnids – include spiders, scorpions, mites, • ticks and chiggers. • Adaptations shared by arachnids: • Waterproof cuticle • Book lungs • Malpighian tubules • Spiracles

  6. Types of arachnids: • Spiders • Mites • Ticks • Chiggers • Scorpions

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