It is called a watershed.
 
        
             
        
        
        
Id say trick question it doesn't. Or, id say, it helps you realize how much to eat and what times you should be eating.
        
                    
             
        
        
        
The kidneys.
The kidneys keep blood isotonic by removing excess salt and water through urine.
 
        
             
        
        
        
Instructions for an inherited traits are called genes.