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Giraffes possess cardiovascular, anatomical, and physiological adaptations that enable them to maintain cerebral perfusion and avoid fainting despite large changes in cerebral perfusion pressure.
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An editorial discussing the physiological adaptations of cerebral blood flow and autoregulation.
When considering autoregulation, it is interesting to first consider the cerebral perfusion of a giraffe. Although their necks are about 2.5 m long, they must be able to drink water from the ground level of the oasis and then eat leaves from trees, causing large changes in cerebral perfusion pressure. Fortunately nature has provided them with several cardiovascular, anatomical and physiological adaptions to enable them to do so without fainting.1
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Grüne et al. (2017) conducted an editorial in Cerebral blood flow and autoregulation. Giraffes possess cardiovascular, anatomical, and physiological adaptations that enable them to maintain cerebral perfusion and avoid fainting despite large changes in cerebral perfusion pressure.
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