11.   These new blood vessels help restore normal blood flow to an oxygen starved heart.

12.   They injected the drug into the hind legs of mice whose legs were deprived of normal blood supplies.

13.   They then inflated the balloon, pushing open the artery and restoring normal blood flow.

14.   Vitamin D aids in the absorption of dietary calcium, but its most important role is in maintaining normal blood levels of calcium.

15.   Widening the artery allows more normal blood flow.

16.   Just half an hour of secondhand smoke can impair normal blood flow to the heart, a Japanese study suggests.

17.   They found it restored normal blood flow in the hearts of more than three-quarters of heart attack victims.

18.   While American astronaut Michael Foale tended his cosmic greenhouse, his two Russian colleagues donned big pleated pants with vacuum pumps to restore normal blood circulation.