Ключевые слова: abstract, aged, anatomy, aorta, arrow, arrows, art, backdrop, background, biology, bone illustration, brain, brain thinking, brainpower, cerebellum, cerebral, concept, convolutions, cortex, creative, decor, design, draft, drawing, education, handwritten, head, human, icons, illustration, image, intelligence, lightning, medical, medicine, mind, object, organ, outline, paper, psychology, science, shape, sticker, stress, stroke, study, symbol,