How do ducks exchange gas with the environment?

Ducks exchange gas with the environment primarily through their respiratory system, which includes lungs and air sacs. When ducks inhale, oxygen-rich air fills their lungs and air sacs, allowing for efficient gas exchange; oxygen is absorbed into the bloodstream while carbon dioxide is expelled. This process is enhanced by their unique respiratory structure, which allows for a continuous flow of air, improving oxygen uptake during both inhalation and exhalation. Additionally, ducks can also exchange gases through their skin to a lesser extent.