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Large Intestine
...  peritoneum. The anus is the opening of the anal canal that serves as the exit to the body. The wastes deposited in the anal canal are being regulated by two sphincter muscles, both voluntary and involuntary muscles. The internal sphincter is made up of smooth muscle tissues. The external sphincter is formed by skeletal muscles. Anal columns are the long partitions of vascular mucous membranes  ...


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