Move That Body | Incredible Things You Didn't know about Spiders

Move That Body

Spiders are arachnids, not insects. The arachnid family includes scorpions, mites, ticks and harvestmen. The differences between arachnids and insects are mostly anatomical. Arachnids have 8 legs, insects 6; an insect's body is comprised of 3 segments, head, thorax and abdomen, an arachnids of 2, cephalothorax and abdomen; insects have compound eyes, arachnids simple eyes; insects have antennae, arachnids don't; many insects have wings, arachnids never; insects have mandibles, arachnids have chelicerae (the appendages in front of the mouth of an arachnid, of course); insects undergo some form of metamorphosis, arachnids don’t. So, is the difference clear?

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