I am researching the respiraory system and how it works, I'm finding out about stuff i've never know about like , the surface area of the lungs is roughly the same size as a tennis court, or that the highest recorded sneeze speed is 165 km per hour !!!! Before I go on to talk about the problems smoking causes your lungs, I'm going to study the respiraory ststem and what it's like when it's in a healthy condition.
