Explanation:
because the pressure exerted by artery is more than that of vein due to its narrow lumen and thick walls...causing it difficult to clot.
 
        
             
        
        
        
Answer:
Carbon reservoirs are underground oil or gas trap that form reees.clastic limestones etc.This is the most earths carbon stored in rocks and sediments.Ocean,Biosphere,Soil Carbon are some examples of carbon reservoirs.
 
        
                    
             
        
        
        
Answer:
correct
Explanation:
Water carries nutrients to all cells in our body and oxygen to our brain. Water allows the body to absorb and assimilate minerals, vitamins, amino acids, glucose and other substances. Water flushes out toxins and waste.
 
        
                    
             
        
        
        
Nephrons
Nephrons are the basic structural
and functional units of the kidneys.  Each
of the kidneys contains over a million nephrons. Nephrons function by filtering
blood and then removing needed substances from the filtrate before eliminating
the remaining fluid that contains water, metabolic waste, and toxins.as urine. This process occurs through three stages which
are ultrafiltration, selective reabsorption and osmoregulation.