Abdomen, Pelvis & Perineum
All form anorectal ring except (AIIMS May 2013)
References: Pg. 1160; Gray's Anatomy (40th Ed.)
Anorectal ring is a muscular present at the junction of rectum and anus.
- it is formed by fusion of fibres of
- Uppermost fibres of external anal sphincter
- Internal anal sphincter