Ключевые слова: alternative, ancient, animal, annelid, anxiety, blood, bloodsucking, care, closed, comprise, dangerous, detoxification, disgust, doctor, glass, healing, health, hermaphrodite, hirudotherapy, hospital, illness, invertebrate, jar, leech, leeching, medical, medicinal, medicine, microbiology, nature, paraphyletic, parasite, physic, plastic, relief, research, ricefieldcrabs, science, segmented, skin, slice, specimen, stained, sucker, sucking, tentacle, therapy, water, wet, worm,