Arteries generally carry oxygen-rich blood, and smoking constricts arteries and increases clotting to block arteries. Given these facts, smoking will decrease the flow of what in the body among the following options:
- oxygen-rich blood
 - blood clots
 - preventing heat transfer
 - heat energy
 - electric current
 - all liquids
 - layers of fat
 - ashes


 

 oxygen-rich blood        