Lung Models

As we study the respiratory system, the movement of the diaphragm can be confusing for students.  This year, I decided to make a model with them using a cup, balloons, and straws.  We built the models together and they worked in pairs to determine which organ was represented by each part of the model. After the models were labeled, I taught students how to use them.  Each time your diaphragm contracts, it gives your lungs more space to expand and fill with air.  This can be seen as you pull the stretched balloon down and the lungs fill up with air.  These models gave students a visual to help them understand how the diaphragm works.  Next time I make these models with students, I will try to plug the top opening with clay.  In some models, the cut at the top of the cup was too large so the lungs did not fill up with enough air to clearly see it.