Leech Information Blog — explination

          The leech is an aquatic worm with a flattened body, tapering end terminating in circular flattened disc, the hinder one being larger of two. It swims with a vertical undulating motion and moves, when out of water by means of these discs or suckers, flattening itself first by one and then by other and alternately stretching out and contracting its body. The mouth is placed in the centre of the anterior disc and furnished with 3 cartilaginous lens shaped jaws. These jaws are lined at their edges with fine sharp teeth and meet so as...