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

aid alternative ancient animal annelid belttype biology black blood bloodsucker bloodsucking care class closed crabs dangerous detoxification disgust doctor education glass healing health healthy heparin hermaphrodite hirudinea hirudo hirudotherapy illness invertebrate jar leech leeching medical medicinal medicine microbiology nature paraphyletic parasite ricefieldcrabs ringworms science skin subclass suck sucker tentacle therapy water wet wildlife worm