The answer is the nervous system. 
Hope this helps!
        
                    
             
        
        
        
The aorta carries oxygen rich blood away from the heart.
The pulmonary artery transports deoxygenated blood from the heart to the lungs.
The inferior vena cava carries deoxygenated blood from the lower body to the heart.
The coronary artery branches from the aorta and provide oxygen to the heart muscles.
 
        
                    
             
        
        
        
Nose, mouth, pancreas, kidney, tell me if i missed some
        
                    
             
        
        
        
Answer: 3. Chocolate is the best ice cream flavor
Explanation: 
statements there are subjective are based on or influenced by personal feelings, tastes, or opinions.
#3 is a subjective statement because someone else may disagree with the person who said chocolate is the best ice cream flavor.