Anatomy Explorer
Anal Sphincter Muscle
by
Written by
Tim Taylor
Anatomy & Physiology Senior Writer
Tim Taylor is a senior writer at Innerbody Research focusing on human anatomy and physiology. Tim earned both his Bachelor of Science degree in Biology and his Master's degree in Teaching from the University of Pittsburgh.
Last updated: Feb 21st, 2026
Click to View Larger Image
The anal sphincter alters rectal outflow and is partly voluntary, allowing a decision on when to empty the bowel.
Get the Innerbody Newsletter
Be the first to know about our latest reviews and biggest discounts
No spam! Your privacy is important to us.
Copyright © Innerbody Research 1997 - 2025. All Rights Reserved.
Innerbody Research does not provide medical advice, diagnosis, or treatment. You must consult your own medical professional.
