Answer:
Damage to the heart muscle 
 
        
             
        
        
        
<span>Membrane structure and function: The plasma membrane, also known as the cell surface membrane or plasma-lemma, is the boundary of the cell. It regulates the movement of materials into and out of the cell and facilitates electrical signaling.</span>
        
             
        
        
        
Answer: The answer is A, Transcription 
 
        
             
        
        
        
Bone Marrow is tissue in the hollow centers of our bones, it has stem cells which produce our blood cells. It also produces red blood cells that give oxygen to the whole body. Hope this helped : )