This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Dust cells can be found in the _____. 
Select and explain. 
A. Brain, B. Heart, C. Lungs, D. Liver
C: Lungs
Answer: C: Lungs 
Explanation: Dust cells, along with heart failure cells, are macrophages that are found in the lungs. They are part of the reticuloendothelial system.