Reactants. Reactants are the substances that are needed for a chemical reaction to occur. Without reactants there are no products.
        
                    
             
        
        
        
Answer:

Explanation:
In a chemical reaction, the <u>produc</u>ts are <u>produc</u>ed. The <em>react</em>ants are the substances that <em>react.</em>
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In a chemical reaction equation (with the arrow pointing right) the reactants are on the left and the products on the right. 
The reactants enter and the products come out. 
So, the statement given - products enter a reaction and reactants come out - is false and it is actually the other way around. 
 
        
             
        
        
        
I believe the correct response would be D. Are not composed of one or more cells.
        
             
        
        
        
After a large meal, the pancreas helps by producing insulin, which helps break down sugars.
        
             
        
        
        
Hello,
Here is your answer:
Your answer is the circulatory system!
The circulatory system connects the veins all around the body so the blood can be transported around the body.
Your answer is Circulatory system!
If you need anymore help just ask me!
Hope this helps!