Absorption it regulates the pH of the filtrate by exchanging hydrogen ions in the interstitium for bicarbonate ions in the filtrate; it is also responsible for secreting organic acids, such as creatinine and other bases, into the filtrate.
I hope this helps
 
        
             
        
        
        
The decay product is Radon-222 gas
        
             
        
        
        
It is B, it could also be D, but it is most likely B. Hope this helps.
        
             
        
        
        
Answer:
earth worm is really fat and digestive system means u eat some and digesteds
 
        
             
        
        
        
Answer:
skeletal system is a bone that we are having in all human bodies like skeletal in our head it protects our brain. like that the skeletal system defines