Period+2+Respiratory+Script

H: Hello Discovery Channel viewers! My name is Loretta Smith , B:And my name is Bill Walters. H: We will be taking a tour in the respiratory system. We are going to be shrinking our selves so we can go into a real persons body.Our producer will be doing the shrinking process. B: To start off our tour, Loretta and I have to enter this closet to shrink our selves. H: We are shrunk, now I will be entering the respitory system through the nose. B: I will be entering through the mouth. Our meeting place is going to be in the pharynx. H: Hi everyone, I'm entering the nose. I will be doing the proccess that air goes through. Air enters the body through the nose and then moves to spaces called the nasal cavities. I see a sticky material that moistens the air and keeps lining from drying out, this is mucus. Some of the cells in the lining and nasal cavities produce mucus. Cilia is found in the nose which line the nasal cavities. The cilia's job is to sweep mucus into the throat. And then you swallow it! Many things destroy mucus such as stomach acid. B:I am entering the mouth to go the the pharynx. Air enters through the nose and mouth and enters into pharynx. The pharynx is shared with the digestive system. The pharynx is connected to the nose, mouth, and trachea. H:Bill and I have met in the trachea. We will go all of the way down the trachea. There are firm rings of cartilage that strengthen the trachea and help keep it open. Just like the nose, the trachea is lined with cilia and mucus. The trachea's cilia and mucus clean and moisten the air that first began in the nose. You cough when particles irritate the lining of the trachea. Food does not go through the trachea, actually only air. If food goes down the trachea, it can block the opening and prevent air from getting to the lungs. This is when you choke! There is a small flap of tissue that fold over the trachea, it seals when you swallow. In this case, Bill and I are able to go down the trachea. B: Right now i am entering the bronchi. Then after the air moves through the trachea it goes into the bronchi. The bronchi is the place that directs the air into the lungs. The left bronchi direct into the left, and the right bronchi directs into the right lung. The lungs are one of the more important organs in the body. H: I see alveoli! Alveoli are tiny sacs of lung tissue that is specialized for the movement of gases between air and blood. A network of capillaries surround the each alveoli. It is here that the blood picks up its cargo of oxygen from air. B: Every living thing breaths. As you breath in, your body gets oxygen fro the air. Your rib muscles contract to pull ribs up and out. The muscle in the diaphragm contracts to pull down the lungs. Tissue expands to suck in air. H: You get rid of other gases that your body doesn't need when you breath out. Your rib muscles relax. The muscles in the diaphragm relax too. Tissue returns to resting position and forces air out. And that ends our tour! H: Oh No! We have just got in a scary report! This body that we are in, has had contact with smoking. We can tell because of the look of the lungs! This is very bad. Lungs are supposed to look pinkish but this lung is black and dark! We have to go or we could be in trouble. Bye Everyone! B: Bye Discovery Channel viewers! Don't Smoke! Or your lungs with look like this! B: So join us tomorrow to learn about the skeleton system. Hope you have a good day and take care of your respiratory system.