K-rat nasal passages cool air and retrieve moisture Most mammals use a 1 mm counter(逆流，反向) current system in the nasal(鼻)passages for cooling the warm saturated air leaving the lungs,so that water condenses on the way KANGAROO RAT out. mouth clescd K-rat's nasal passages are long and convoluted (旋绕的)-more water 于04)万 0 recaptured (inhalation (byexhalationK-rat nasal passages cool air and rat nasal passages cool air and retrieve moisture retrieve moisture Most mammals use a counter （逆流，反向） current system in the nasal （鼻）passages for cooling the warm saturated air leaving the lungs, so that water condenses on the way out. K-rat’s nasal passages are long and convoluted （旋绕的）-more water recaptured