1. Respiratory Model Open to Respiratory notes, you will need a pencil

2. Respiratory Model Materials: 1 cup 1 large balloon 1 small balloon 1 straw Rubber band Putty

3. Procedures 1. Puncture a small hole in the bottom of the cup, the same diameter as the straw. 2. Place the small balloon onto the straight end of the straw, but not all the way in. 3. Place the rubber band around the balloon to hold it onto the straw.

4. 4. Cut off the end of the large balloon (the part that you blow into). 5. Slide the straw into the opening in the cup so that the cup is upside down, and the small balloon appears to be suspended in the middle of the cup. DO NOT BLOW INTO THE STRAW, it will break the model! 6. Using the putty, form an airtight seal around the cup and straw at the opening that you made earlier.

5. 7. Take the large balloon and stretch it over the large opening of the cup. Be carful not to crack the cup. (You might have to adjust/cut the balloon a little more). 8. Draw the model in your journal

6. So how does it work? Holding the model in one hand, grasp the balloon at the bottom with the other. Pull down on the balloon and observe what happens to the small balloon inside. Do not release the balloon when you have it pulled down. – What do you notice What happens when you allow the balloon to the move back up?

7. Let’s label the model. – Cup = Thoracic Cavity or your chest – Opening of Straw= Nose and Mouth – Long part of Straw= Trachea or windpipe – Small balloon= Lungs – Large balloon at bottom= Diaphragm

8. Explain When the diaphragm flexes and moves downward is there more or less space inside of the cup? – More space = less pressure on the lungs allowing it to fill with air (oxygen) When the diaphragm extends or moves back up, is there more or less space inside the cup? – Less space= more pressure on the lungs forcing air out (carbon dioxide)

9. What purpose does the Respiratory System have? It supplies oxygen to the circulatory system, and gets rid of carbon dioxide waste.

10. https://www.youtube.com/watch?v=bHZsvBd UC2I https://www.youtube.com/watch?v=bHZsvBd UC2I