Answer :
Final answer:
Anatomical barriers, physical removal of microorganisms, bacterial antagonism by normal microbiota.
Explanation:
Anatomical barriers to infection: These are physical barriers that prevent the entry of pathogens into the body, such as the skin and mucous membranes.
Ways to physically remove microorganisms:
- Coughing
- Sneezing
- Vomiting
- Diarrhea
Bacterial antagonism by normal microbiota: Normal bacteria in the body can outcompete harmful bacteria, preventing infections. For example, Lactobacillus in the gut helps maintain a healthy microbial balance.
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