Rectum.
The rectum is an 200mm chamber which connects the colon to the anus. It is the rectum's job to receive the stool from the
colon, to let the person know there is a stool to be evacuated and to hold the stool until evacuation happens. The brain then
decides if the rectal contents can be released or not. If they can, the sphincters relax and the rectum contracts, disposing its
contents.