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

aid alternative ancient animal annelid belttype biology blood bloodsucking care class closed comprise crabs dangerous detoxification disgust doctor earthworms education glass healing health hematophagia hermaphrodite hirudotherapy illness invertebrate leech leeching medical medicalleech medicinal medicine microbiology nature parasite parasitic physic procedure ringworms science skin specimen subclass suck sucker sucking suction tentacle therapy water wet worm