exhalation exhalation Wikipedia exhalation English exhalation humans (and other living things) exhale CO2 English exhalation Expiration Exhalation English expiration Exhalation English expelling exhalation exhalation English English exhalation Exhale English English English English English English exhalation English English exhalation English English exhalation English English exhalation exhalation http://en.wikipedia.org/wiki/Exhalation exhalation humans (and other living things) exhale CO2 exhalation exhalation Wikipedia expelling http://en.wikipedia.org/wiki/Exhalation English exhalation English Exhalation English English English exhalation exhalation English English English