Some articles on anal, external anal sphincter:
... The relevant anatomy includes the rectum, the anal canal and the muscles of the pelvic floor, especially puborectalis and the external anal sphincter ... The rectum is a section of bowel situated just above the anal canal and distal to the sigmoid colon ... The anal canal is the short straight section of bowel between the rectum and the anus ...
Famous quotes containing the word external:
“Without free, self-respecting, and autonomous citizens there can be no free and independent nations. Without internal peace, that is, peace among citizens and between the citizens and the state, there can be no guarantee of external peace.”
—Václav Havel (b. 1936)