Ключевые слова: abstract, anatomy, background, biological, care, colored, concept, dark, design, disease, element, gradient, health, hygiene, icon, illustration, infecting, infestation, internal, intestinal, line, linear, logo, medical, medicine, modern, nematoda, nematodes, outline, parasite, parasites, parasitology, pest, research, roundworms, scientific, sign, small, stomachache, style, symbol, thin, worm, yellow,