The rectum and anus are the last part of the digestive system. The anus is formed of multiple muscles that act as a sphincter, or gate.
These sphincters open up when you go to the bathroom and allow the stools to pass out.
There are two sets of veins, or blood vessels. One is on the inside and the other one on the outside of the rectum.
In next post we shall discuss symptoms and causes of hemmorrhoids.
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