Which sense organ contains the olfactory receptors responsible for detecting smells?

Which membrane surrounds the lungs and reduces friction during breathing movements?

Which common food preservation method works by removing moisture to inhibit bacterial growth?

Which gas is produced during the electrolysis of water at the positive electrode called the anode?

Which type of lens is used to correct hyperopia or farsightedness?

Which element is the primary component of natural gas used for cooking and heating?