This is a worksheet that summarizes the circulatory system. It breaks down the parts and functions of the circulatory system (heart, arteries, veins, and capillaries). The information is appropriate for students 6th grade through 12th grade. It can be used as a study handout, worksheet during class, or an assessment. Included is the handout with information to be used with a lesson plan and a blank worksheet for classwork or assessment purposes.