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Exam (elaborations) GIZMOS___Circulatory_System.

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Name: ______________________________________ Date: ________________________ Student Exploration: Circulatory System Vocabulary: artery, atrium, blood vessel, capillary, circulatory system, heart, he... art valves, platelet, pulmonary artery, pulmonary vein, red blood cell, urea, ventricle, vein, white blood cell Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. Why do you need blood? _____________________________________________________ _________________________________________________________________________ 2. What organ pushes blood through your body? _______________ Gizmo Warm-up The Circulatory System Gizmo shows the heart and blood vessels that make up the circulatory system. Look at the heart. 1. How many chambers does the heart have? _______________ 2. Turn on Show labels. What are the names of the chambers? _______________________, _______________________, _______________________, _______________________ 3. Do you see tiny “doors” that open and close as blood is pumped through the heart? ______ These are heart valves. Heart valves control the flow of blood through the heart. 4. Click Heartbeat sound and listen for the two parts of the heartbeat, nicknamed “lub” and “dub.” Observe the heart. (Note: The recording is not in sync with the heart animation.) What do you think causes heartbeat sounds? In fact, the “lub” sound is caused by valves from the atria to the ventricles closing, and the “dub” sound is caused by the valves from the ventricles to the blood vessels closing. 5. Challenge: Why do you think the left atrium and left ventricle are shown on the right side of the diagram? ______________________________________________________________ [Show More]

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