Page 31 - E-book Digestive System

6. Anus
The anus is a short tube at the end of the rectum and serves as a passageway
for feces to pass. The process of removing food waste that is no longer needed
through the anus. The function of the anus is to expel feces from the digestive
tract. In this case, the function of the anus in the upper layer is useful for
recognizing waste substances that will come out, whether they are in the form of
liquid, gas, or solid.The process of expulsion of feces, namely after the feces
undergo decay and absorption of water content, the peristaltic motion will push
the feces towards the rectum, in this rectum, the feces are stacked / collected first,
if the rectum is full, the rectum will send impulses to the brain which will be
translated as taste heartburn, then, the muscles of the stomach and the muscles of
the intestines and rectum will push the feces out of the anus.

Picture 14. Structure and anatomy of anus

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