How do we get these wastes out? Have you ever wondered why we suddenly feel like defecating? To start with, defecation is an organized event mediated by neural influences. Do you know that rectal pressures dictate whether you get to have feces in your underwear or not? A rise to 18 mmHg in the rectal pressure is what initiates the urge to defecate; when the pressure settles at 55 mmHg, an automatic expulsion of fecal matter occurs. How? Read on!
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