Explanation:
Bedbugs are parasites that rely on blood to survive. They can feed on the blood of any mammal, although they appear to prefer the blood of humans. They are attracted to the warmth surrounding mammalian bodies and the carbon dioxide present in breath expiration. It is usually these factors that guide bedbugs to locate a suitable host for feeding. DOES THIS HELP?
 
        
                    
             
        
        
        
The answer is a beaker.
~ThePirc
        
                    
             
        
        
        
This is called homeostasis