What are the characteristics of the Phylum Platelmintos?
Organisms are multicellular, free-living, marine and freshwater, and parasitic
They have bilateral symmetry and are dorsoventrally flattened
They have a single opening of the digestive system, the mouth, and no anus
They have a hermaphrodite reproductive system
They have no skeletal, circulatory, or respiratory systems
They have a nervous system composed of a pair of upper ganglia and one to three pairs of longitudinal nerves with transverse commissures
They have a surface covered with cilia used for locomotion
They exchange gases and eliminate nitrogenous waste through the body surface