This Science quiz is called 'Basic Anatomy - The Circulatory System' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.
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The circulatory system is also known as the cardiovascular system. It is made up of the heart and the blood vessels or arteries and veins. It is the process in which blood flows through the body in order to circulate oxygen to the tissues and organs. It is a massive system. In fact, if you were to take all of the veins and arteries of an adult human and stretched them out, it would stretch for approximately 60,000 miles!