With the higher animals. Giraffes have a big heart to pump blood to the brain to rotate. Giraffe able to pump blood to the brain than the human brain is three times to go up to about 8 feet with a water pump which pumps water up to the building. The heart of the giraffe weighs about 10 kg blood circulation, so it is a special type called "Rete mirabile" help prevent potential hazards from the blood to the brain too much time bent giraffe drinking water. This special circulatory system is like a water valve open.
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