collagen fibers, I hope this was helpful to you :)
 
        
             
        
        
        
Answer:
Explanation:
cells, tissues, organ, and body system.
 
        
                    
             
        
        
        
Answer:
Papillary Layer
Explanation:
In addition, the papillary layer contains phagocytes, defensive cells that help fight bacteria or other infections that have breached the skin. This layer also contains lymphatic capillaries, nerve fibers, and touch receptors called the Meissner corpuscles.
 
        
             
        
        
        
Basically, humans use lot's of energy for heating, lighting, movement, and machines, that energy has come from and energy source. Some sources are renewable, and some are None-Renewable. In general as a Non-Renewable source are fossil fuels. These come from under the ground meaning that there not usable. There can be a fixed amount of coal, oil, and gas in the world and when we use this energy then its gone and there is no coming back.
  -Hope this helps .