1.   Blood circulates around the body.

2.   If your muscles are tense, blood cannot circulate freely.

3.   Blood circulates through the body.

4.   A pumping device -- the heart--to make the blood circulate.

5.   As a result, blood vessels dilate, making it easier for blood to circulate.

6.   Blood circulates through the body by flowing down one leg and up the other.

7.   Drugs cannot reach places where blood does not circulate, and radiation fails in these zones because it needs oxygen to kill cells.

8.   Maybe your blood has circulated enough in the last few years to make it all the way to your brain.

9.   People with heart failure also feel fatigue because not enough blood circulates through their body to provide oxygen and food.

10.   She watches as her blood circulates through the machine at her bedside, the stem cells that hold the key to her future slowly accumulating.