Members of the phylum Platyhelminthes are flatworms, such as the planarian. Grubs and tapeworms are other examples of flatworms. Flatworms display bilateral symmetry; that is, the left and right halves of the body are mirror images of one another.
Dhaka is located in central Bangladesh at 23Â°42â²N 90Â°22â²Eï»¿ / ï»¿23.700Â°N 90.367Â°Eï»¿ / 23.700; 90.367, on the eastern banks of the Buriganga River. The city lies on the lower reaches of the Ganges Delta and covers a total area of 300 square kilometres (120 sq mi).
Urban area: 15.66 million people. Population density: 43,500 people per square kilometer. One of the fastest growing cities in the world, Dhaka has attracted economic migrants from all over Bangladesh. As many as one quarter of Dhakaâs residents live in crowded slums, according to the World Bank.