1 The population density in Parkersburg is 3367% higher than West Virginia. 2  The median age in Parkersburg is 1% higher than West Virginia. 3  In Parkersburg 95.35% of the population is Caucasian. 4  In Parkersburg 1.77% of the population is African American.  In Parkersburg 0.47% of the population is Asian.
The Polychaeta or polychaetes are a paraphyletic class of annelid worms, generally marine. Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. Indeed, polychaetes are sometimes referred to as bristle worms.
Annelids are segmented coelomateworms, most of which live in the sea. The annelid body iscomposed of numerous similar segments. Classes of Annelids. The three major classes of annelidsare the polychaetes (marine worms), the oligochaetes(earthworms and related freshwater worms), and thehirudines (leeches).