I believe it's the last two. "makes the lungs able to fill more completely" and "helps the blood vessels dilate more easily" hope this helps, have an amazing day :)
        
             
        
        
        
Answer:
Permanent brain damage begins after only 4 minutes without oxygen, and death can occur as soon as 4 to 6 minutes later.
Explanation:
So a person can survive 4 to 6 minutes without oxygen, but may experience brain damage. 
 
        
             
        
        
        
Answer: I got this same question and I was looking for the answers and could not found it but this I what I put. Food nutrition labeling by the FDA is important because it gives customers the ability to view the ingredients listed and find what they are looking for. For example women need more calcium to prevent brittleness in bones. 
 
        
                    
             
        
        
        
Answer:
Several strains of bacteria can cause acute bacterial meningitis, most commonly: Streptococcus pneumoniae (pneumococcus). 
Explanation:
This bacterium is the most common cause of bacterial meningitis in infants, young children and adults in the United States. It more commonly causes pneumonia or ear or sinus infections.