Funda used in hospital

We all see that oxygen/ artificial breathing is done to a patient, the gas/air is sent through water so that it carries some moisture with it.
- This is done to ensure that the mucous layer in the wind pipe doesn't dry up.
:)


People use oxygen mask but why does it have holes....when tubes are used to send the oxygen clearly the tube doesn't close the total hole.... ever wondered why???
- Pure oxygen is dangerous. Patients are given in air with enriched oxygen.