GIZMO Circulatory System

Exam (elaborations) GIZMO Circulatory System 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 transport oxygen throughout the body. 2. What organ pushes blood through your body? 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? Yes These are valves. Valves keep blood from flowing backward in the heart and blood vessels. 3. Turn on Show labels. What are the names of the chambers? Left atrium, Right atrium, Left ventricle, and Right ventricle 4. Click PLAY and listen for the two parts of the heartbeat, nicknamed “lub” and “dub.” (Note: The recording is not in sync with the heart animation.) Observe the heart. A. Which chambers contract during “lub”? Left atrium & Right atrium B. Which chambers contract during “dub”? Left ventricle & Right ventricle 5. Challenge: Why do you think the left atrium and left ventricle are shown on the right side of the diagram? The x-ray was taking on someone's back to have a better picture. Activity A: Blood flow Get the Gizmo ready: ● Turn off Show labels. ● 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 This study source was downloaded by from CourseH on :39:10 GMT -05:00 This study resource was shared via CourseH GIZMO Student Exploration: Circulatory System flow through the four chambers? Left atrium, Right atrium, Left ventricle, and Right ventricle 3. Analyze: Observe the path of blood that leaves each ventricle. A. Where does blood from the right ventricle go? To the head B. Where does blood from the left ventricle go? To the lungs 4. Collect data: Use the syringe to collect a blood sample from the right ventricle (on the left side of the heart diagram). Look at the Data from blood sample numbers. A. What is the concentration of oxygen in this sample? Mostly red blood cells (some white blood cells) B. What is the concentration of carbon dioxide in this sample? 47.6% 5. Collect data: Now collect a blood sample from the left atrium. A. What is the concentration of oxygen in this sample? 91.3% B. What is the concentration of carbon dioxide in this sample? 38.6% 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? The right is slower so blood can get to