Ключевые слова: 3d illustration, anabolic, androgen, atom, atomic, background, biology, black, blackboard, board, chalk, chemical, chemistry, class, composition, compound, concept, design, doping, drawing, drug, formula, health, hormone, male, man, medical, model, molecular, molecule, research, school, science, sex, sexual, sign, skeletal, steroid, structural, structure, substance, supplement, symbol, testosterone, text, white, word, write,