Food and air both enter your body through your mouth, diverging when they reach the esophagus and trachea. Food goes to the gastrointestinal tract through your esophagus and air travels to your lungs via the trachea, or windpipe.
You will be making a model of how your lungs work in this lab. It will include the trachea, lungs, and the diaphragm, which expands and contracts as it fills and empties your lungs.
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You’ll want something like this: https://amzn.to/3zmXlWv
Where can I get the Y valve and hose? I’ve looked on Amazon and home science tools