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Of the 650 species of leech listed, Hirudo medicinalis is one of the most extensively studied. This annelid from the subclass Hirudinea has 2 suckers, one housing the mouth and its 3 jaws. It lives mainly in the stagnant waters of marshes and ponds. When it comes to reproduction, the animal is a hermaphrodite. Inseminated leeches lay their eggs during the spring and summer months, outside the water, with cocoons containing as many as thirty young.
1 how many different kinds of gametes can individuals. 1  39 pages. M01_REEC5174_09_IE_2-9. Notes to Instructors Chapter 2 The Chemical Context of Life Chapter 3 Water and the F. 2  5 pages. Z02_REEC5174_09_IE_APPB. Appendix B An Introduction to Data Analysis and Graphing for a Mac This appendix prov. 3  5 pages. Z01_REEC5174_09_IE_APPA.