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

alternative ancient animal annelid background belttype biology bite blood bloodletting bloodsucking care class closed comprise crabs dangerous disgust doctor fluke glass healing health hemolymph hermaphrodite hirudinea hirudo hirudotherapy invertebrate jar leech leeching medical medicalleech medicinal medicine nature parasite parasitic physic pot procedure relief ringworms science skin specimen subclass suck sucker therapy water wet wildlife worm