Maximum expiratory flows, maximum inspiratory and expiratory pressures and lung volumes were measured in 246 8-year old 215 12-year old healthy school children. Eight year old girls had a smaller total lung capacity but higher volume-corrected expiratory flows than boys. Maximum expiratory flow and total lung capacity increased more in girls than in boys between 8 and 12 years old. Girls had a greater increase in residual volume (.23 liter for girls and .16 liter for boys) as well as lower maximum expiratory and inspiratory pressures. Girls have smaller lung volumes than boys, so one would expect smaller airways in girls, but girls generate greater air flows, indicating that their airways are possibly wider than those of boys. There is also evidence of unequal growth of the airways and air spaces between 8 and 12 year olds.
Ellison’s not eight yet, but perhaps this has something to do with the fact that she can scream her ass off for hours without tiring. Girls are cool because they can strip paint and break glass with their voices. It’s only appropriate that, only two days before Halloween, we pay tribute to girls’ ability to make ears bleed and achieve cinematic greatness with their wider airways, God-given vocal abilities and volume-corrected expiratory flows.