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No. The muscular opening is the anal sphincter, or simply, 'anus'. The part of the intestine that leads up to the anus is called the rectum. The rectum is more or less just a storage place until the intestine is ready to empty itself through the anus to the outside world.
Waste is removed out the the rectum then out of the anus. The sphincter is what controls how much comes out at once. J.w
The rectum is the last portion of the large intestine. It stores solid waste until it is released from the body by the opening known as the anus.
Colon or large intestine is a muscular tube attached with rectum through a smaller muscular tube, the cancer which is present in the upper colon is known as colon cancer, and if tumor is present in the lower colon (rectum) then it is called cancer of the rectum or rectal cancer or colorectal cancer.
The anus is the opening from the rectum to the outside of the body. The rectum is the final section of the large intestine.
rectum
Anus
anus
There are two sphincter muscles that "close" the rectum.
because it has a complete muscular layer around it
The large intestine connects the small intestine to the rectum. While it's shorter than the small intestine, it is wider, and so it is called "large."
Fecal matter forms in the intestines, mainly the large intestine. Right before defecation, it is stored in the rectum. Finally, the fecal matter passes out the anus, the muscular opening for passing fecal matter.