A placenta would the answer because that is whats used during pregnancy. please mark brainiest answer XD
 
        
                    
             
        
        
        
Answer:
The number of heartbeats per unit of time, usually per minute. The heart rate is based on the number of contractions of the ventricles (the lower chambers of the heart). The heart rate may be too fast (tachycardia) or too slow (bradycardia).
Explanation:
 
        
                    
             
        
        
        
The “Gut” is referring to the stomach and other organs inside you body. Hope this helps man
        
                    
             
        
        
        
Smoking can cause heart disease, blood cancer, bronchitis, and the actual cigerate can burn you.
I hope this helps you!