I need a science experiment on the respiratory system to do with the class?

Question

I have to do science experiment with a grade 6 class. It must be simple, quick and use little materials. Please be quick, I need it for tommorrow.

Answer 1

You can suck noodles through your nose and out your mouth to prove they are connected together and part of your respiratory system

You can use onions and goggles

You can still cry while cutting onions using goggles because your respiratory system is connected to your sinuses and the onion fumes actually turns to sulpuric acid (acid rain stuff) when it somes into contact with water and irritates the eyes and still make you cry

Just some ideas ^^ good luck next time think of something earlier

Answer 2

get two balloons and too straws, attach the two straws to the balloons then just blow in and out on the straws.