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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.