ANIMAL -KINGDOM-ARACHNIDS.

THE CLASS ARACHNID A INCLUDE SPIDERS (ORDER ARANEAE) and Scorpions (order scorpion-es). The class is a part of the phylum Arthropod a , which also includes insects and crustaceans.Spider and scorpions are characterized by having four pairs of pincers like mouth parts called chelicerae;another pair of frontal appendages called pedipalps , which are sensory in Spiders but used for grasping in Scorpions ;and a body divided into two sections ( a combined head and thorax called a cephalothorax or prosoma , and a abdomen or opisthosoma)unlike other arthropods , spider and scorpions lack antennae .Spider and Scorpions are carnivorous .Spiders poison prey by biting with a fanged chelicerae, Scorpions by stinging with the end of the metastases (tail).
Spiders must shed their exoskeleton (external skeleton) to grow .During moulting , the exoskeleton splits and the spider pulls it self out , leaving behind the old exoskeleton
ARACHNIDS.

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