Ключевые слова: aid, alternative, ancient, animal, annelid, bite, black, bleeding, blood, bloodsucker, bloodsucking, body, care, closed, complementary, dangerous, disgust, doctor, glass, healing, health, hemorrhage, hermaphrodite, hirudinization, hirudotherapy, hospital, hyaluronidase, invertebrate, jar, leech, leeching, medical, medicinal, medicine, nature, paraphyletic, parasite, peptidase, procedure, relief, science, sick, skin, small, sucker, therapy, varicose, varicosity, water, wet,