How doi make a 3D model showing gaseous exchange in the alveoli?

Answer 1

If it is for a class, get the class to BE the alveloi. Start one person as the wind pipe who then with two people jooining on one hand branch into the two bronchial tubes then get two people on each of their arms and so on. The people on the end are the alveoli. Get a few remaining children to be the blood cells that pass back and forth past the alveoli.

The first wind pipe person says 'oxygen' and passes the word on to the next two who spread it on to the next two and so on, till the alveoli say 'oxygen' to the blood cells. The blood cells then "exchange' by saying 'thanks for the oxygen. here is some Carbon Dioxide' back to the alveloi who pass the words 'carbon dioxide' up the line to the wind pipe who 'lets it go"

(instead of just saying words you can use coloured paper and have them tear it in halfves as it goes down the 'lung line', red & blue balls, whatever..)

For a 3d model may i suggest using small red & blue ballons or even bubble wrap for the alveoli?...