What is the difference between the rectum and the anus?

The rectum is the final portion of the large intestine. It empties stool from the body through the anus. anus is the external opening of the rectum (the bumhole) see the link ======> http://images.google.com/imgres?imgurl=http://www.nlm.nih.gov/medlineplus/ency/images/ency/fullsize/9390.jpg&imgrefurl=http://www.nlm.nih.gov/medlineplus/ency/imagepages/9390.htm&h=320&w=400&sz=12&hl=ru&start=3&um=1&tbnid=QtrXaPxmSz8j6M:&tbnh=99&tbnw=124&prev=/images%3Fq%3Drectum%26svnum%3D10%26um%3D1%26hl%3Dru%26lr%3D