System

Name: ______________________________________ Date: ________________________

Student Exploration: Circulatory System

Vocabulary: artery, atrium, blood vessel, capillary, circulatory system, heart, 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? ___to live and be able to perform daily activites __________________________________________________

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2. What organ pushes blood through your body? ___the heart_________________________________

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? _____4__________

2. Do you see tiny “doors” that open and close as blood is pumped

through the heart? ________ These are valves. Valves keep blood from flowing backward.

3. Turn on Show labels. What are the names of the chamber? Right Atrium,

Right ventricle ,Left atrium, left ventricle

4. Observe the two parts of the heartbeat. The first part of the heartbeat is nicknamed “lub,” and the second is nicknamed “dub.” (This is because a heartbeat sounds like “lub-dub.”)

A. Which chambers contract during “lub”? _____tricuspid and mitral _______________________________

B. Which chambers contract during “dub”? ____aortic and pulmonary the _______________________________

5. Challenge: Why do you think the left atrium and left ventricle are shown on the right side of the diagram? _the way the heart is angled

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|Activity A: |Get the Gizmo ready: |[pic] |

| |Turn off Show labels....