Arthropoda is the largest phylum in the world. Should all of these creatures really be classified together under one group? Why or why not? What do they all have in common? Cite some facts or examples to support your point of view.
I believe that all of the creatures currently classified as arthropods should continue to be under one phylum. As long as it makes sense to do so, it makes sense to do so, right? The five things that make an arthropod an arthropod are:
-An Exoskeleton
Meaning they’re invertabrae. Their skeleton is on the outside.
-Segmented Bodies
Segmented both inside and out.
-Jointed Appendages
As in limbs.
-Bilateral Symmetry
Divided vertically in two mirror images.
-Open Circulatory System
Blood is pumped through spaces called sinuses to reach tissue.
Sources: http://animals.pawnation.com/5-characteristics-arthropod-5177.html
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