When theorizing about human physiology, descartes relied heavily on the hydraulic model he observed in moving statues. in descartes' view of humans, flowing in nerves is (are) analogous to water flowing in the pipes of the statues?

Animal spirit

Explanation:

According to the French philosopher Rene Descartes, reflexes are caused by some fluid flowing in nerves of animals and human. The fluid flows in the same way as water flows in the pipes Accordingly, nerves as hollow and the fluid "animal spirit" flows through the nerves. The flow of animal spirit through nerves makes the animals and human to bring about the reflex actions in response to stimuli.

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