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.
Size range and diversity of structure. The length of annelids varies from a fraction of an inch to more than six metres (about 20 feet). The width may exceed 2.5 centimetres (about one inch) in the contracted state. Free-moving polychaetes and earthworms include the largest species.