stackyFACTSHaving a neck that absurdly long comes with a very serious risk of instant cranial explosion.
Having a neck that absurdly long comes with a very serious risk of instant cranial explosion. To pump blood all the way up to a giraffe's head requires a heart that beats wildly hard, generating blood pressure twice that of a human. If a giraffe bends down to drink water, gravity would send a lethal rush of blood to its brain, except they possess the 'rete mirabile'—a net of specialized valves that restrict blood flow and prevent fatal strokes.
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