Answer: radioactive as in blow up and decay means to vanish slowly pretty much 
Explanation: blowing up and slowly vanishing 
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~rikka ~
 
        
                    
             
        
        
        
Step 2 should be sensory neurons send electrical signals to the brain
Step 3 brain learns information about the environment 
Step 4 brain sends electrical signals to the muscles
        
                    
             
        
        
        
Answer:
The lungs are a pair of spongy, air-filled organs located on either side of the chest (thorax). The trachea (windpipe) conducts inhaled air into the lungs through its tubular branches, called bronchi. The bronchi then divide into smaller and smaller branches (bronchioles), finally becoming microscopies
Explanation: