sphincter
The Pyloric Sphincter is a ring of muscles that regulates the emptying of the stomach into the duodenum and prevents the contents of the small intestine from moving back into the stomach.
iris
Anus. The muscles of the anus are called sphincters, or in doctor terminology, sphincter complexes.
The ring finger is weaker compared to other fingers because it has fewer independent muscles and tendons supporting its movements. Additionally, the ring finger is biomechanically connected to the little finger, further limiting its strength and dexterity.
The anal canal has a ring of muscle, called the anal sphincter
Its a ring of muscles that move an animals food through its stomach and intestines.
Smaller than Jerry, Freddie/Muscles and Joey
The ring shaped muscle in the digestive system is the lower esophageal sphincter (LES).
sphincters
because the muscles in each finger aren't strong enough to move individually.
At both ends of your esophagus there is a ring of muscle. Usually, the muscles keep your stomach's contents where they belong. With laryngopharyngeal reflux, the muscles don't work right and stomach acids backs up into your throat.