Circulatory System Gizmo SE

Exam (elaborations) Circulatory System Gizmo SE 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 regulate the blood flow and carries water and minerals. 0. 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? It has 4 chambers 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. 0. Turn on Show labels . What are the names of the chambers? Right atrium, left atrium, right ventricle, left ventricle 1. 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”? Right atrium, and left Atrium A. Which chambers contract during “dub”? Right ventricle, left ventricle 2. Challenge: Why do you think the left atrium and left ventricle are shown on the right side of the diagram? X ray was taken on someone’s back to show it better. Activity A: Blood flow Get the Gizmo ready : ● Turn off Show labels . ● Turn on Show blood flow . 0. 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, left atrium, right ventricle, left ventricle 0. Analyze : Observe the path of blood that leaves each ventricle. A. Where does blood from the right ventricle go? the head __ A. Where does blood from the left ventricle go? ___ the lungs ____________ 1. 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? It is mostly red blood cells with some white blood cells 34.8. A. What is the concentration of carbon dioxide in this sample? 47.6