It would be the endocrine system. 
        
             
        
        
        
<span>The inputs are also called reactants. In Cellular respiration, there are certain inputs in the form of glucose and oxygen. The outputs, generally known as the products, are water, carbon dioxide, and ATP molecules. 
The general equation used to represent the inputs and outputs of cellular respiration is: 
Glucose + Oxygen → Carbon Dioxide + Water + ATP + Heat + Energy 
C₆H₁₂O₆ +6O₂ → 6CO₂ + 6H₂O + Energy (ATP+ Heat)</span>
        
             
        
        
        
Fat is the nutrient needed as an energy store and insulation.
 
        
             
        
        
        
Where are the questions so i can answer them?