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.
The annelids include earthworms, polychaete worms, and leeches. All members of the group are segmented, in other words, made up of segments.Segmentation is also called metamerism, which is a linear sequence of body segments.he annelids include earthworms, polychaete worms, and leeches. All members of the group are segmented, in other words, made up of segments.