Function of integumentary system: PROTECTION<span>- barrier against infectious, chemical, radioactive, and physical damage.
- keratin and junctions block bacteria, fungi, and blunt objects.
-macrophages identify foreign particles and activate immune response.</span>
        
             
        
        
        
Answer:
G 0 is a resting phase where the cell has left the cycle and has stopped dividing. The cell cycle starts with this phase.
 
        
                    
             
        
        
        
Answer:
A. Integumentary system 
Explanation:
The integumentary system consists of the skin,hair and nail. This system consists of the largest organ in the body. The skin helps in protection against pathogens by shielding the internal body system from external objects.
The skin also helps in Vitamin D production through sunlight.
It also helps to prevent dehydration through regulation of water loss.
 
        
             
        
        
        
omg... that's really hard and i don't know what the answer is.
Explanation:
by the way, thanks for points
 
        
             
        
        
        
It’s iterative ontogenetic and di - or polymorphic