SCIENCE 103Student Exploration- Circulatory System ALL ANSWERS CORRECT. RATED A.

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Student Exploration: Circulatory System Vocabulary: artery, atrium, blood vessel, capillary, circulatory system, heart, heart 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? Blood brings oxygen and nutrients to all the parts of the body so they can keep working 2. What organ pushes blood through your body? The heart is a large muscular organ which constantly pushes oxygen-rich blood to the brain and extremities and transports oxygen-poor blood from the brain and extremities to the lungs to gain oxygen 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? The heart consists of four chambers in which blood flows. 2. Turn on Show labels. What are the names of the chambers? The right atrium The right ventricle. The left atrium The left ventricle. 3. Do you see tiny “doors” that open and close as blood is pumped through the heart? yes These are heart valves. Heart valves control the flow of blood through the heart. 4. Click PLAY 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.) [Show More]

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