There are about 15,000 species in this phylum. The phylum includes earthworms, leeches, and marine worms known as polychaetes. Species in this phylum have metameric bodies. Metameric bodies are divided into segments called annuli. The annuli are covered in tiny hairs called setae. Setae help the worms move.
Philadelphia (/ËfÉªlÉËdÉlfi.É/) is the largest city in the Commonwealth of Pennsylvania and the fifth-most populous city in the United States, with an estimated population of 1,567,442 and more than 6 million in the seventh-largest metropolitan statistical area, as of 2015.
A: Philadelphia, PA is located in Philadelphia county. The county was founded in 1682 by William Penn, and it is one of the three original counties of Pennsylvania, along with Bucks County and Chester County.