Unlike insects that have three parts of the body, the spider has only two. The front segment is called cephalothorax or prosoma, which is actually a combination of the head and chest. While the back segment is called the abdomen (stomach) or opisthosoma. Between the cephalothorax and abdomen there is a thin connector called the pedicle or pedicellus.
The cephalothorax attaches four pairs of legs, and one to four pairs of eyes. In addition to a pair of large-jawed jaws (called chelicera), there are also a pair or several mouth-like aids called pedipalpus. In some types of spiders, pedipalpus in adult male animals enlarges and changes function as aids in marriage.
Spiders do not have mouth or teeth to chew. Instead, the mouth of the spider is a sucker to suck the prey body fluids.
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