Articles > Quizzes & Surveys > Circulatory system definition – quiz Circulatory system definition – quiz Quiz Choose the best answer. 1. Biological system responsible for transporting substances throughout the body of an organism Lymphatic system Circulatory system Excretory system 2. Blood bathes the organs directly Open Closed Passive transport 3. Blood is transported within blood vessels Open Closed Passive 4. Human circulatory system Open Closed Passive 5. The circulatory system of most arthropods Open Closed Passive Send Your Results (Optional) Your Name To Email Time is Up!