Explanation:
I don't think he provided all the information or some words are misspelled 
 
        
             
        
        
        
The buffer systems functioning in blood plasma include plasma proteins, phosphate, and bicarbonate and carbonic acid buffers. The kidneys help control acid-base balance by excreting hydrogen ions and generating bicarbonate that helps maintain blood plasma pH within a normal range.
 
        
             
        
        
        
The first cells were identified in a cork bark.