The more heavily smoke-exposed study participants also had more relatively large holes in their lungs . Lungs of adults who had grown up with secondhand smoke had more `` holes '' Many `` holes '' -- less dense areas of lung -- are characteristic of emphysema . Even though smoke-exposed lungs functioned fine , there 's concern for future health . Comment:
Lungs of adults who had grown up with secondhand smoke had more `` holes '' Many `` holes '' -- less dense areas of lung -- are characteristic of emphysema . Even though smoke-exposed lungs functioned fine , there 's concern for future health . Comment: