eli5: How does CO2 get into exhalations when you breathe?

Question

Seems like we breath so fast? So how does the exchange happen so quickly?

In: 0

Answer 1

If you lit a candle and blew the smoke away, it doesn’t linger. Gasses can move very quickly, so it wouldn’t be hard for the CO2 to get out no matter how quickly or slowly you breathe.