Through which of the labeled structures does air flow on its way into the lungs?

Prevention measures:

1. Clean your hands often. Use soap and water, or an alcohol-based hand rub.

2.Maintain a safe distance from anyone who is coughing or sneezing.

3.Wear a mask when physical distancing is not possible.

4.Don’t touch your eyes, nose or mouth.

5.Cover your nose and mouth with your bent elbow or a tissue when you cough or sneeze.

6.Stay home if you feel unwell.

7.If you have a fever, cough and difficulty breathing, seek medical attention.