Answer: mucilaginous sheath
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Answer:pencil life cycle is way different because as you know they make pencils from wood which is trees so they have to grow the trees first. 
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We learned in biology class that every cell in the body has the same DNA. Whether a heart cell, skin cell or muscle cell—they all read from the same genetic blueprint. Now, scientists are learning there is more to the story.
 
        
                    
             
        
        
        
The condition is known as tardive dyskinesia.
        
             
        
        
        
Ventilation is the act of moving/pushing air into and out of the lungs.