Respiratory- You breath faster to help supply the muscles with more oxygen. 
Integumentary (skin) - Sweat helps cool down the body.
        
             
        
        
        
Answer: Up
Explanation: when an electron goes up it produces more energy which makes light. :)
 
        
             
        
        
        
It has two layers.
Hope I could help :)
        
                    
             
        
        
        
Explanation:
This is an atom with a covalent bond