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

aid alternative ancient animal annelid belttype blood bloodsucking care class closed comprise dangerous disease disgust doctor glass healing health healthy hematophagia hemolymph hermaphrodite hirudotherapy illness invertebrate jar leech leeching medical medicinal medicine microbiology nature paraphyletic parasite physic procedure research ricefieldcrabs ringworms science segmented skin slice stained subclass sucker sucking suction therapy water wet wildlife worm