[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: The Permian-Triassic Extinction
There is though, in the respiratory system. The throat forms a dead
air column, which gets reprocessed during the next breath and reduces
the oxygen content in the lungs while increasing the carbon dioxide
content. In long throats, this would be a measurable difference.
Wouldn't that require a _very_ long windpipe? Isn't the dead air in the
throat completely expelled when the bird exhales?