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

alternative ancient animal annelid annelida belttype biology black blood bloodletting bloodsucking care class closed comprise crabs dangerous detoxification disgust doctor fluke glass healing health hematophagia hemolymph hermaphrodite hirudo hirudotherapy hospital invertebrate jar leech leeching medical medicalleech medicinal medicine nature paraphyletic parasite physic ricefieldcrabs ringworms science segmented skin subclass suck sucker sucking therapy water wet worm