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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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There are 60,000 miles of blood vessels in every adult human.
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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.