| A ascending, transverse, descending and sigmoid colon, caecum, rectum and anal canal |
| B caecum, descending, transverse, ascending and sigmoid colon, rectum and anal canal |
| C caecum, ascending, transverse, descending and sigmoid colon, anal canal and rectum |
| D caecum, ascending, transverse, descending and sigmoid colon, rectum and anal canal |