Ключевые слова: aid, alternative, animal, annelid, background, biology, black, blood, bloodsucking, body, closeup, detail, extreme, health, hirudinea, hirudo, hirudotherapy, hospital, human, illness, insect, isolated, leech, leeches, macro, medical, medicinal, medicinalis, medicine, microbiology, nature, parasite, parasitic, science, skin, small, sucker, treatment, wet, white, worm,