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Name: Alissa CallowayDate: May 11, 2013
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? The blood cells carry Oxygen to cells of the body. If you had no blood, there would be no way of getting Oxygen to all of the cell in your body

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.

How many chambers does the heart have? The heart has four chambers the heart has 2 main chambers atrium & ventricles

1. Do you see tiny “doors” that open and close as blood is pumped
through the heart? Yes these are valves. Valves keep blood from flowing backward.

2. Turn on Show labels. What are the names of the chambers? Right atrium, Left atrium, Right ventricles, Left ventricles

3. 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”? The right atrium and the left atrium

B. Which chambers contract during “dub”? Left and Right ventricle.

Challenge: Why do you think the left atrium and left ventricle are shown on the right side of the diagram? the left atrium and ventricle are shown on the right side of the diagram because its like looking in a mirror, when you move your right arm, your reflections' left arm moves

|Activity A: |Get the Gizmo ready: |[pic] | | |Turn off Show labels. | | |Blood flow |Turn on Show blood flow. | |

Question: How does blood flow through the heart?

1. Observe: Blood in each chamber of the heart is represented by little balls. Observe the balls as they move through the heart and lungs.

2. Label: Turn on Show labels. Label the four chambers of the heart on the diagram. Then draw arrows to show the direction that blood flows through the heart.

Starting at the right atrium, in what order does blood flow through the four chambers?

Right atrium, Right Ventricle, Left Ventricle, Left Atrium

3. Analyze: Observe the path of blood that leaves each ventricle.

A. Where does blood from the right ventricle go? It's then pumped through the pulmonary arteries to the lungs.

B. Where does blood from the left ventricle go? It goes to the aortic valve, then to the aorta, and flows to the body

4. Collect data: Use the syringe to collect a blood sample from the right (blue) side of the heart. Look at the Data from blood sample on the right side of the Gizmo.

A. What is the concentration of oxygen in this sample? ____________________

B. What is the concentration of carbon dioxide in this sample? ____________________

5. Collect data: Collect a sample from the left (red) side of the heart.

A. What is the concentration of oxygen in this sample? ____________________

B. What is the concentration of carbon dioxide in this sample? ____________________

6. Draw conclusions: Between the right ventricle and the left atrium, blood goes through the lungs. Based on the data you have collected, what happens in the lungs?

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|Activity B: |Get the...
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