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==Introduction==

==Introduction==

Breathing systems are the connecting component between the anaesthetic machine and patient. Their role is to deliver oxygen and anaesthetic agent to the patient from the machine, remove exhaled carbon dioxide and provided a means of ventilatiion via pressure on the reservoir bag.  

Breathing systems are the connecting component between the anaesthetic machine and patient. Their role is to deliver oxygen and anaesthetic agent to the patient from the machine, remove exhaled carbon dioxide and provided a means of ventilation via pressure on the reservoir bag.  

Basic components of a breathing system are -  

Basic components of a breathing system are -  

*''Pressure relief valve'' - Limit pressure build up and allows for removal of waste gases.

*''Pressure relief valve'' - Limit pressure build up and allows for removal of waste gases.

*''Fresh gas inlet'' - Connects the circuit to the gas outlet on the anaesthetic machine.

*''Fresh gas inlet'' - Connects the circuit to the gas outlet on the anaesthetic machine.

==Classification==

==Classification==