Hirudidae
Hirudidae is a family of annelid worms known as leeches. Members are primarily aquatic, with most species living in freshwater, though some are terrestrial or semi-aquatic. They occur worldwide in temperate and tropical regions and range from a few millimeters to several centimeters in length.
Anatomy and physiology: Like other leeches, hirudids are dorsoventrally flattened and segmented into a series of
Ecology and behavior: Most hirudids are temporary ectoparasites that attach to vertebrate hosts, obtain a blood
Taxonomy and nomenclature: The name Hirudidae appears in older or alternate taxonomic treatments; in many modern
Medical significance: The saliva of many leeches contains anticoagulants, vasodilators, and anesthetics. The medicinal leech Hirudo