Even though we cannot survive for more than few minutes if we stop breathing or if our heart stops, why is it so that our heart beat is controlled involuntarily while breathing can be voluntarily controlled to a certain extent. I just noticed that blinking of eyes also falls in this category; though we involuntarily blink and our eyelids close involuntarily in bright light, there is still voluntary modulation. What kind of evolutionary changes and natural selection could have led to these kind of voluntary modulations i.e. cortical control over these processes?
closed as unclear what you're asking by WYSIWYG, fileunderwater, terdon, dustin, MattDMo Apr 28 '15 at 14:36
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