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

The reality simple answer is bloodstream.

Infections are a threat because they can access the cells and as we all know we are a big complicated donut and our intestine on the outside of our body.