12 valves of anesthetic machines

1. Oxygen valve
2. Nitrous oxide valve
3. Air valve
4. Halothane valve
5. Isoflurane valve
6. Sevoflurane valve
7. Desflurane valve
8. Enflurane valve
9. Xenon valve
10. Cyclopropane valve
11. Ethylene valve
12. Carbon dioxide valve

1. Oxygen Inlet Valve

- Allows oxygen to enter the anesthesia machine

2. Oxygen Pressure Valve

- Regulates the pressure of oxygen entering the machine

3. Oxygen Flowmeter

- Measures the flow rate of oxygen

4. Air Inlet Valve

- Allows air to enter the machine

5. Air Pressure Valve

- Regulates the pressure of air entering the machine

6. Air Flowmeter

- Measures the flow rate of air

7. Nitrous Oxide Inlet Valve

- Allows nitrous oxide to enter the machine

8. Nitrous Oxide Pressure Valve

- Regulates the pressure of nitrous oxide entering the machine

9. Nitrous Oxide Flowmeter

- Measures the flow rate of nitrous oxide

10. Flush Valve

- Delivers fresh gas into the breathing circuit, clearing out any residual gases

11. Auxiliary Gas Inlet Valve

- Allows other gases, such as helium or xenon, to enter the machine

12. Scavenging Valve

- Removes waste gases from the machine and the breathing circuit