QUESTION: I have a 1990 Toyota Corolla LE, with automatic transmission, which I purchased new. It now has 101,000 miles on it. In all the years I've had it, there was never a major problem. All the ...
PHILADELPHIA (WPVI) -- Heart valves play an important role in the circulation of blood throughout the body. They open and close to control or regulate the blood flowing into and out of the heart.
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