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being able to cut into equal left and right halves, with sense organs on its posterior end
excretory system of planarians is composed primarily of bulblike structures called -------
only worms in this section that have separate sexes, two openings in the digestive system, and a pseudocoelem, include Ascaris
have one opening in the digestive system, an acoelmate, is a hermaphrodite, include Planaria
these fish are not good swimmers because they lack paired fins, bore holes in fish and lives off the body fluids
fish that has movable jaws and a skeleton of cartilage belong to this class, include shark, skates, rays
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