Page 31 - Ebook Digestive System Grade XI

6. Anus
The anus is a short tube that the rectum and serves as a passageway for feces
to pass. Removing food waste is no longer needed through the anus. The function
of the anus is to expel feces from the digestive tract. In this case, the position of
the anus in the upper layer helps recognize waste substances that will come out,
whether 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 complete, the rectum will send
impulses to the brain, translated as taste heartburn. Then, the stomach muscles 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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structure and function of the digestive system

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estiveSystem

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