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.
The written history of Philadelphia begins on October 27, 1682, when the city was founded by William Penn in the English Crown Province of Pennsylvania between the Delaware and Schuylkill rivers.hiladelphia grew from a few hundred inhabitants in 1683 to over 2,500 in 1701. The population was mostly English, Welsh, Irish, Germans, Swedes, Finns, Dutch, and African slaves. Before William Penn left Philadelphia for the last time on October 25, 1701 he issued the Charter of 1701.