Special Types Of Spider Collection For Science Book. Spiders Are Air-Breathing Arthropods That Have Eight Legs, Chelicerae With Fangs Generally Able To Inject Venom, And Spinnerets That Extrude Silk. They Are The Largest Order Of Arachnids And Rank Seventh In Total Species Diversity Among All Orders Of Organisms.

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air-breathing animal arachnids arthropod arthropods book branch chelicerae circle collection diversity eight extrude fangs flower generally grass green inject insect invertebrate largest leaf legs line nature order orders organisms rank science seventh silk special species spider spiders spiderweb spinnerets symmetry total types venom wing