A risk of impaired fetal growth increases is the answer.
-Steel jelly
 
        
             
        
        
        
Hormones
Neuroendocrine cells are like nerve cells, but they also make hormone like cells of the endocrine system. They receive messages from the nervous system and respond by making and releasing hormones. These hormones control many bodily functions.
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Answer:
 is part of the cardiovascular system;  
pumps blood to the cells in the body works; 
closely with the lungs
Explanation:
The heart is a muscle that  pumps blood through the blood vessels and that is the essential function. It is the main and central organ of the circulatory system.  
The heart weights between 200 and 425 grams. It is located between lungs, in the middle of the chest and it is divided into four chambers in humans, other mammals, and birds heart.  
 
        
                    
             
        
        
        
All muscle cells share four main properties that distinguish them from other cells. These are Excitability, Contractility, Extensibility and Elasticity.
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