Spiders (order Araneae) are air-breathing arthropods that have eight legs, and chelicerae with fangs that inject venom. They are the largest order of arachnids and rank seventh in total species diversity among all other groups of organisms. Spiders are found worldwide on every continent except for Antarctica, and have become established in nearly every habitat with the exception of air and sea colonization. As of 2008, approximately 40000 spider species, and 109 families have been recorded by taxonomists; however, there has been confusion within the scientific community as to how all these families should be classified, as evidenced by the over 20 different classifications that have been proposed since 1900. Anatomically, spiders differ from other arthropods in that the usual body segments are fused into two tagmata, the cephalothorax and abdomen, and joined by a small, cylindrical pedicel. Unlike insects, spiders do not have antennae. In all except the most primitive group, the Mesothelae, spiders have the most centralized nervous systems of all arthropods, as all their ganglia are fused into one mass in the cephalothorax. Unlike most arthropods, spiders have no extensor muscles in their limbs and instead extend them by hydraulic pressure. Their abdomens bear appendages that have been modified into spinnerets that extrude silk from up to six types of silk glands within their abdomen. Spider webs vary widely in size, shape and the amount of sticky thread used. It now ...
This is a once-a-decade event!
I WANT A BUNNY NOW!!!
lol, i dont think these r scary .. the title was a joke :D. my class went on a field trip to the baltimore aquarium and fort mchenry, so i hung out w/ my friends and i brought a camera... thanks to hannah, josie, and well.. all the animals in this video.
tribute to spidey.
In the third episode, we look at this little spider which is VERY common in Britain (or maybe other places). This footage was taken in early 2007 for a Spiderman movie that was in production, but it was eventually canceled later in the year so the film was never made.
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in this movie i will show you my 21 PETS!!!! there names are cojack; mali uromastix, maleina: blue tongue skink, spike; green Iguana, coco and loco; leopard geckos, the seven dwarfs; fire belly toads, shrek; garden toad, skife; garter snake, pez ; dachshund ;disney; lab/mutt; kiki;cat, and orphey;cat as you can see i pretty much run a zoo in my room but all my pets are cool so i do recomend getting some of these types of pets.
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