This is the 10800th most frequent Catalan word.
respiratori
Respiratory.
In this sentence, 'respiratori' is used as an adjective to describe the system related to respiration.
El sistema respiratori dels mamífers és molt complexe.
The respiratory system of mammals is very complex.
'Respiratoria' here functions as an adjective modifying 'capacitat', indicating the ability related to respiratory processes.
Vaig fer un exercici per millorar la meva capacitat respiratoria.
I did an exercise to improve my respiratory capacity.
In this example, 'respiratori' is used as a noun to signify a device aiding respiration, showcasing its nominal usage.