MOVEMENTS OF LEECHES

The medical leech is moving in three ways: creeping, swimming and swaying. When crawling, the back suction cup is firmly held on the ground, the front suction cup reaches to the maximum distance that the suction cup can reach and adheres firmly to the ground. Then, the posterior segment is released to come close to the anterior segment and adhere to it. The leech repeats this cycle to relocate itself. Swimming movement is performed by dorsoventric corrugation. This type of swimming is provided by the growth of the longer muscles. Leeches carry out swaying movement in water by adhering their posterior sucking discs to a fixed location and releasing their anterior sucking discs and fibrating their bodies to back and forth and from right to left and vice versa (Barnes, 1974; Çağlar, 1973; Demirsoy, 1982; Kastner, 1967; Sağlam and Sarıeyyüpoğlu, 1998).