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.
Harrisburg is the capital city of the Commonwealth of Pennsylvania in the United States, and the county seat of Dauphin County. With a population of 48,904, it is the ninth-largest city in the Commonwealth. It lies on the east bank of the Susquehanna River, 107 miles west of Philadelphia. The Harrisburg-York-Lebanon, PA Combined Statistical Area is made up of six counties in south central Pennsylvania. As of the 2010 United States Census the CSA had a population total of 1,219,422, and ranked 3r