Here is search logs of 650,000 AOL users. It's very interesting to view search history of particular person and analyze his personality. Let's do it together! Read more about AOL search database scandal or view research papers on web searching.
leech
Acanthobellidea Euhirudinea
(but see below)
Trivia about leech
Yes, these parasitic annelids of the class hirudinea can actually help drain a hematoma, but yeeeesh!
Hirudinea medicinalis is a species of this bloodsucking worm used in medicine
Used by primitives for blood letting, surgeons now use this worm to reattach severed body parts
Medical use of this bloodsucker seen here dates back over 2500 years
From its etymology you can figure out that "sangsue", from Round 15, is a name for this worm