Like, how do they know they need lungs for oxygen? How do they know to send waste to our kidneys? How do they know to always keep the heart beating?
In: Biology
Evolution. The brain is “prepackaged” to do certain things. That’s why every brain follows a similar “map” within species and down a family line. E.g., all mammal brains share certain structures. All human brains (except disease and mutation) have a really big frontal lobe (relative to the rest of the brain).
The process of getting to such a complex brain took literally millions of years through the evolution of life and millions of now extinct species along the way. it seems really abrupt to spring into life as an individual at the end of that very long chain of change, but we are actually just a gradual step along a meandering path.
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