Nothing. The anus is the opening of the digestive tract. The opening is closed by the sphincter which is a strong ring of muscle.
The cervix, or cervix uteri, is the ring of muscle found at the base of the uterus.
The Ciliary Muscle is a circular ring of smooth muscle attached to the lens of the suspensory ligaments.
It is the diaphragm.
No it is not.
It's from a Latin word meaning "ring" because it's a ring of muscle.
The Upper Esophageal Sphincter is a ring of skeletal muscle that controls the movement of food from pharynx to esophagus.
the tunica media consists almost entirely of smooth muscle why?
Horses are unable to vomit (be sick); they have a strong ring of muscle at the top of their stomach that acts like a one way valve and does not allow food back up.
no
No. It is a very strong muscle.
He's pretty strong he was probaly the strongest person in the ring.