The cells are producing carbon dioxide and water. By taking in oxygen, the one performing cellular respiration releases carbon dioxide into the air.
        
             
        
        
        
True, your legs are examples of levers.
        
             
        
        
        
Nuclear envelope is the answer
        
                    
             
        
        
        
Answer:
Coronary Artery
Explanation:
A blockage by blood clot formation is coronary artery called as thrombus reduces the blood flow to the heart. The reduced blood flow causes the heart to dysfunction and the myocardial infarction occurs. Heart tissue can sustain serious damage upon such a shock.