The method of bringing oxygenated air into contact with a gas exchange surface is called?

The method of bringing oxygenated air into contact with a gas exchange surface is called?

آکسیجن والی ہوا کو گیس کے تبادلے کی سطح کے ساتھ رابطے میں لانے کا طریقہ کیا ہے؟
Explanation

Ventilation: the process of bringing oxygenated water or air into contact with a gas-exchange surface.