Leech
A leech is a aquatic parasitic organism that sucks blood from animals to eat. It has a long history of use in medicine although today its use is mainly limited to limb reattachment procedures instead of the wide-ranging medical use of the past. Leeches were once so commonly used that doctors were popularly called leeches.
Leeches
Scientific classification
Kingdom: Animalia
Phylum: Annelida
Class: Clitellata[?]
Subclass[?]: Hirudinea Orders
Arhynchobdellida[?]
Rhynchobdellida[?]