The document outlines an activity to identify and organize the key parts, descriptions, and functions of the circulatory system. It provides a graphic organizer for students to fill in the missing pieces, including the parts of the circulatory system (heart, blood vessels, blood), types of blood vessels (arteries, veins, capillaries), types of circulation (pulmonary, systemic, coronary), and descriptions of each. The goal is for students to complete the entire circulatory system concept map.