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The arachnid body is divided into the head-chest (cephalothorax) and the back (abdominal) body.Between the cephalothorax and the abdomen there is a narrow section like the waist,called pedisel.Pada head-chest there are 4 pasangkaki,also there are two mouth tools,as follows.1 ) The sting device (pedalpus) The body of the Arachnida is divided into two parts:the anterior and posterior.The anterior part,called the cephalothorax, contains the sense organs,the mouth,and the limbs in pairs.The first pair of limbs is called chelicerae can form pincers or poison fangs,and spouses-both pedipalpus-can serve as a brace,touch,or leg.Other body parts,generally four,are used for walking.The posterior part of the body,stomach,there is a genital opening and other structures.this is usually equipped with gills that have been modified called the lung book.Most Arachnids are solitary except at mating,when various patterns of behavior the complex can be observed.Betina can keep the egg or child.
Link structure https://id.m.wikipedia.org/wiki/Arachnida