leech on the glass. bloodsucking . subclass of ringworms from the belt-type class. hirudotherapy

alternative ancient animal annelid anxiety belttype biology blood bloodsucker bloodsucking care class clitellum closed dangerous detoxification disease disgust doctor education fluke glass healing health hemolymph heparin hermaphrodite hirudinea hirudotherapy invertebrate jar leech leeching medical medicinal medicine nature parasite physic pot procedure research ricefieldcrabs ringworms science skin specimen stained subclass sucker tentacle therapy water wet worm