Discuss the natural defenses of the respiratory tract.

• Include your opinion on the adequacy of the natural defenses of the respiratory tract. 
• Discuss whether or not you think they are sufficient to protect the main portal of entry.
• Explain your answers. 

  Discussion Expectations: 
This should be a substantive response (between 75 -150 words minimum) to the topic(s) in your own words, referencing (using APA format) what you have discovered in your required reading and other learning activities.