More circulation questions
1.  Diagram and label cross-sections of an artery and a vein.  What are the main differences between the two?

 
 
 
 

2.  Why are capillaries so small relative to the size of arteries and veins?
 
 
 
 

3.  What purpose do the valves in your circulatory system serve?
 
 
 
 
 

4.  What can happen if a mother and a baby have a different Rh factor?
 
 
 
 


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