What role do nursing theories play in the practice of nursing? What role do nursing theories play in the practice of nursing? up to 300 wordsWhat role do nursing theories play in the practice of nursing?up to 300 words and not less than 250 words.What role do nursing theories play in the practice of nursing? up to 300 wordsWhat role do nursing theories play in the practice of nursing?up to 300 words and not less than 250 words.