Ventilation Perfusion Relationship/ratio 

Thank you so much sarmada..😊 keep watching and sharing

Due to gravity the pleural space in the apex increases increasing the volume. By boyles law the volume and pressure are inversely related. Hence more volume -- less pressure meaning the pressure becomes more negative. So more suction pressure created -- leading to more expanded alveoli at apex.

Hi ambiga. Sure will upload on a regular basis. Stay tuned for more videos. Happy Learning 😊