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Author Question: By 1200, though water mills were plentiful in Europe, ____ provided the best source of power. a. ... (Read 84 times) |
There are 60,000 miles of blood vessels in every adult human.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.
Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.
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.