For information relating to the respiratory system in Star Trek canon, see respiratory system.

The respiratory system was a biological system which facilitated the gaseous exchange between a lifeform and its environment. In Humans and some other humanoid species, it was intertwined with the circulatory system.

Caldean Acute Cardiopulmonary Syndrome caused the respiratory system of the infected individual to gradually fail. (Star Trek: The Cantabrian Expeditions: "Isolation")

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