Ключевые слова: alternative, ancient, animal, aquatic invertebrates, background, black, bloodsucking, care, closed, dangerous, discolorate, disease, disgust, doctor, dusky, fishing rod, glass, healing, health, healthy, hibernate, hirudo, hirudotherapy, hospital, illness, marigold, medical, medicine, nature, paraphyletic, parasite, parasitic, physic, pl, procedure, sac, science, skin, suction, tentacle, therapy, water, wet, wildlife, worm,