Why is it when we get a cut in our mouth(the dirtiest place ever) does it not get immediately infected? ELI5
In: Biology
Just as it is close for bacteria to enter the bloodstream from a mucous membrane (like the mouth), it is close for white blood cells to leave the bloodstream and attack bacteria that are attempting to do harm.
The mouth also has a high concentration of immunoglobulins, mainly immunoglobulin A, which neutralizes a lot of bacteria in case they try to proliferate too much.
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