Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Selected mechanisms (in light grey) available to animals in managing gas loading (oxygen, O2; carbon dioxide, CO2; nitrogen, N2) between lungs and different body compartments, with the physiological trade-offs (in dark grey) that might influence these.
