Anal canal | anatomy | Britannica - Anus sizd
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The human anus is the external opening of the rectum. Two sphincters control the exit of feces The anus is surrounded in its length by folds called anal valves, which converge at a line known as the pectinate line. This represents the point of. What size should you start with? Don't try to be a hero and start big because you can — quite literally — tear yourself a new one.