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Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.
Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
The familiar sounds of your heart are made by the heart's valves as they open and close.
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
Blood is approximately twice as thick as water because of the cells and other components found in it.