More than 90% on the crust is composed of silicate minerals. Most abundant silicates are feldspars<span> (</span>plagioclase<span> (39%) and alkali feldspar (12%)). Other common silicate minerals are </span>quartz<span> (12%) </span>pyroxenes<span> (11%), </span>amphiboles<span> (5%), micas (5%), and clay minerals (5%).</span>
        
             
        
        
        
<span>it is a polysaccharidee </span>
        
                    
             
        
        
        
Answer:
because they have thicker walls
Explanation:
blood is punped our of the heart very fast which means it would need a blood vessel witch thick walls to withstand the pressure. thin walls would cause the blood vessle damage and may evwn break as it wouldn't be able to withstans the pressure.
 
        
             
        
        
        
Bitterness, saltiness, and sourness could not be detected by the tip of the tongue
        
                    
             
        
        
        
5. System level 
6. Organ level