The English word cockroach is derived from the Spanish cucaracha through folk etymology. Cockroaches exist worldwide, with the exception of the polar regions. There are roughly 3,490 species in six families.
Spiders are predatory invertebrate animals that have two body segments, eight legs, no chewing mouth parts and no wings. They are classified in the order Araneae, one of several orders within the larger class of arachnids, a group which also contains scorpions, whip scorpions, mites, ticks, and opiliones (harvestmen).
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