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ANSWER KEY Respiratory System Web Scavenger Hunt 2 WOW Cards Directions: Go to Mr. G’s Health Page. Click on Kids Health – How the Lungs Work. Watch the video and read the article. Answer the questions below. Turn this into the Science Bin when you have finished. 1. Your body couldn’t breathe without this system. What is it? The Respiratory System 2. The respiratory system is made up of the trachea, lungs, and the diaphragm 3. When you breathe in air, you take oxygen into your lungs and blow out carbon dioxide. 4. When you inhale, your lungs (inflate, turn purple, deflate.) 5. What is the name of the tiny air sacs in your lungs?_ alveoli 6. The trachea is also called the windpipe 7. The tiny hairs on your lungs that keep mucus and dirt out of your lungs are called cilia 8. The voicebox is also known as the larynx 9. As you breathe, this muscle contracts and flattens to give your lungs room to fill up with air diaphragm 10. Which lung is smaller, left or right? Left (This extra space on the left leaves room for your heart.) 11. alveoli allow oxygen from the air to pass into your blood. 12. The oxygen then enters the blood in capillaries, hitching a ride on red blood cells and traveling through layers of blood vessels to the heart. 13. The heart then sends the oxygenated (filled with oxygen) blood out to all the cells in the body. 14. When it's time to exhale (breathe out), everything happens reverse 15. By now your cells have used the oxygen they need, and your blood is carrying carbon dioxide and other wastes. 16. Keeping your lungs looking and feeling healthy is a smart idea, and the best way to keep your lungs pink and healthy is not to smoke