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 (Pennsylvania German: Harrisbarig) is the capital city of the U.S. state of Pennsylvania and the county seat of Dauphin County. With a population of 49,673, it is the ninth-largest city in the U.S. state of Pennsylvania.It lies on the east bank of the Susquehanna River, 105 miles (169 km) west-northwest of Philadelphia and 204 miles (328 km) east of Pittsburgh.he city is the county seat of Dauphin County. The adjacent counties are Northumberland County to the north; Schuylkill County to the northeast; Lebanon County to the east; Lancaster County to the south; and York County to the southwest; Cumberland County to the west; and Perry County to the northwest.