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

aid alternative ancient animal annelid anxiety background belttype bite blood bloodsucker bloodsucking care class clitellum closed dangerous detoxification disgust doctor glass healing health healthy hematophagia hermaphrodite hirudo hirudotherapy invertebrate leech leeching medical medicinal medicine nature parasite parasitic pot relief research ricefieldcrabs ringworms science segmented skin specimen stained subclass suck sucker suction therapy water wet worm