Q:
      
      
         
            
Which of the following are involved directly in pulmonary circulation?
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: D) right ventricle, pulmonary artery, and left atrium         
         
Explanation: Right ventricle (which pumps blood to the lungs), pulmonary artery (which carries blood to the lungs), and left atrium (which receives blood from the lungs) are involved directly in pulmonary circulation.
       
      
      
      
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