Which are general surface protections that prevent bacteria from entering the body?

Question

Quizplus · Accepted Answer

Antibodies are involved in specific surface protections; they catch and trap bacteria.White blood cells provide general and specific internal protection against infection.Intact skin,mucous membranes,pH of body fluids,normal body flora,and products in saliva,perspiration,tears,and mucus all provide general surface protection and prevent bacteria from entering the body.

Which Are General Surface Protections That Prevent Bacteria from Entering