Given what we know we can confirm that the tracheal wall is related to its function in that it allows it to conduct air in a sealed manner and protect the individual.
<h3>What is the function of the trachea?</h3>
The primary function of the trachea is to conduct air into the lungs. For this, the trachea is long and narrow, to allow air to flow in a directed manner towards the lungs. The trachea is also "armored" to protect this air flow and is lined with mucus to sweep away any unwanted particles from the air. 
Therefore, we can confirm that the trachea is armored and lined with mucus along its long, tube-like shape, which allows this structure to conduct air in a safe, clean, and direct manner directly towards the lungs. 
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Answer:
C.
Explanation:
So, a pathogen is something that causes disease, like a virus like the rhinovirus, which causes the common cold.
 
        
                    
             
        
        
        
Answer:
A lot...... what is the paragraph 
Explanation:
 
        
             
        
        
        
Answer:agrarian society- dependent on agriculture
Modern society-dependent on manufacturing sector for income
Hunter-gather society-dependent on wild plants and animals for their sustenance
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The big bang theory states that the universe began approximately 10-20 billion years ago in an expansion of the universe emanating from an extremely compact point. The occurrence of super massive black holes contradict the big bang theory. Super massive black holes are found at the center of galaxies and is what keeps them together. Models do not explain how these would have formed if the big bang occurred the way it was proposed.