gas exchange is a primary example of simple diffusion,the exchange of *oxygen* and *carbon dioxide* fuels the cellular processes such as photosynthesis and cellular respiration
 
        
                    
             
        
        
        
 the answer to that question is embryo
        
             
        
        
        
The white blood cell identifies the toxin produced by the pathogen and creates antibodies to fight the pathogen
        
             
        
        
        
In the brain especially in the eyes
        
                    
             
        
        
        
Answer:
During photosynthesis the oxygen is released into the atmosphere through
All photosynthetic eukaryotic cells contain chloroplasts that use the radiant energy of sunlight to convert carbon dioxide and water into carbohydrates. As a byproduct of photosynthesis, oxygen gas is also released into the atmosphere through tiny openings in the leaves called stomata.
Explanation: