Discussion Set 2 & Response

Include citations in APA format and no plagiarism. Must be at least one paragraph in length. It must also be free of spelling and grammatical errors. A paragraph format must be used.

– Pick one specific component of the third line of defense and explain how it plays a role in defense against pathogens

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Also, make a one-paragraph response to this paragraph bellow. Please use citations and check the spelling and thegrammar plus no no plagiarism.

1. Response.

The first line of defense consists of epithelial barriers like the skin and mucous membranes. As we know the skin is the largest organ of the body and this acts as a barrier between pathogens and the body. The skin acts as a waterproof barrier. Unless you have a break in your skin then bacteria can’t enter, however if it does get broken then your immune system would then respond. The tears, mucus, and saliva contain an enzyme that helps to break down the cell walls of many bacteria. The cilia which are tiny hairs that line the windpipe will help move any mucus that is trapped away from the lungs. If these particles are swallowed the stomach acid will kill any bacteria and potential parasite. The urine also helps to flush pathogen away from the bladder.





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