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Play free Spider Solitaire The midgut bears many digestive ceca, compartments with no other exit, that extract nutrients from the food; most are in the abdomen, which is dominated by the digestive system, but a few are found in the cephalothorax. The study found that 47% of articles contained errors and 43% were sensationalist. Saw rapid diversification of flying insects, there are very few fossil spiders from this period. S instinctive tactics are only starting points for a trial-and-error approach from which these spiders learn very quickly how to overcome new prey species. However, they seem to be relatively slow "thinkers", which is not surprising, as their brains are vastly smaller than those of mammalian predators. Similarly, arguments can be formed against use of the term abdomen, as the opisthosoma of all spiders contains a heart and respiratory organs, organs atypical of an abdomen. Spider behaviour and appearance are diverse, and the araneids outside Europe, Ja