The organ is the LUNGS.
The lungs excrete carbon dioxide and water vapour through metabolism. 
The lungs are used for breathing in humans, through the lungs we take in oxygen which is carried by the blood to all the part of the body and we exhale carbon dioxide which is a waste product generated as a result of the reactions that occur in the body. 
        
             
        
        
        
Answer:
"This is the reason you are using a special swallowing technique when you eat and drink."
Explanation:
Based on the information provided within the question it can be said that the most appropriate statement by the nurse would be "This is the reason you are using a special swallowing technique when you eat and drink." Mostly because this is a type of cancer that forms in the part of the throat between the base of the tongue and the trachea. Therefore the special swallowing technique is designed in order to place less stress on the affected area and cause more pain.
 
        
             
        
        
        
Answer:
C. Taking blood samples from patients for research purposes
without consent
Explanation:
Generally, providers may not render medical services without the patient’s consent, unless performance of emergency, lifesaving care is necessary. Taking samples from a patient is a type of medical service; thus, state consent laws apply. In addition, providers may not disclose PHI without patient authorization.
It depends on the definition of unethical being used, however I think I am right. I'm in AP bio currently. Let me know what the answer is :) 
 
        
             
        
        
        
Answer:
Make sure everyone meets criteria. 
Not taking supplements( As some may contain Vit D)
No tanning beds
make sure no one has a hypoactive response to vitamin d through whatever way. Injection, capsule, spray.
Check for genetic conditions or cancers like melanoma which indirectly affect vitamin d levels
Explanation:
These are some of the main things to look out for