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

aid alternative ancient animal annelid annelida background belttype blood bloodsucker bloodsucking care class clitellum closed comprise dangerous detoxification disgust doctor glass healing health heparin hermaphrodite hirudo hirudotherapy hospital illness invertebrate jar leech leeching medical medicinal medicine microbiology nature parasite physic plastic pot ringworms science skin specimen subclass suck sucker suction therapy water wet worm