eli5 why you don’t get infections from your mouth, nose, or ears often? What’s the difference between those openings and if you had an open wound which could easily get infected

Question

eli5 why you don’t get infections from your mouth, nose, or ears often? What’s the difference between those openings and if you had an open wound which could easily get infected

In: 37

Answer 1

These openings are covered on the inside by what is known as “mucous membrane”. It’s essentially a different kind of skin that doesn’t grow hair and is usually moist. It’s definitely not an open wound.