死し腔くうしくうじ字FuriganaMeanings1noundead spacemedicine›Medical term for the portion of the respiratory tract where gas exchange does not occur, or more generally any non-functional space in a system.解かい剖ぼう学がく的てき死し腔くうは、ガス交こう換かんに関かん与よしない気き道どうの部ぶ分ぶんを指さす。Anatomical dead space refers to the part of the airway that does not participate in gas exchange.