[ RadSafe ] Query re human pulmonary processes or mechanics.

[Maury]

Does anyone know of or have you seen empirical data re the expulsion of 
CO2 in human breathing?  I've long heard that one with emphysema should 
inhale thru the nose and exhale by mouth with pursed lips. The pursed 
lips have been deemed significant to ridding the body of CO2.  Can 
anyone shed empirical light? Thanks.
Maury Siskel
maurysis at peoplepc.com