Non-specific immunity is directed against any antigen. The body, upon penetration of a foreign substance

Non-specific immunity is directed against any antigen. The body, upon penetration of a foreign substance, forms an adequate response. What are the non-specific factors of protection (immunity) of the human body for the penetration of pathogenic bacteria?

1) all mucous membranes synthesize mucins, which glue pathogenic bacteria;
2) mucous membranes produce liquid secretions that wash away pathogenic bacteria;
3) the top layer of the skin is exfoliated and pathogenic bacteria are removed along with the skin cells;
4) commensal bacteria (lodgers) live on the skin and mucous membranes, which do not allow “outsiders”;
5) there are cells in the skin and mucous membranes that synthesize substances that make the environment aggressive for pathogenic bacteria, for example, lysozyme of saliva and lacrimal fluid, hydrochloric acid of gastric juice

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