The cervix, or cervix uteri, is the ring of muscle found at the base of the uterus.
It's from a Latin word meaning "ring" because it's a ring of muscle.
The color ring of muscle that controls the size of the pupil is called the iris. It can expand or contract to regulate the amount of light entering the eye.
The anal canal has a ring of muscle, called the anal sphincter
The ring of skeletal muscle that regulates the movement of a bolus into the esophagus is called the upper esophageal sphincter (UES). The UES opens to allow the passage of food and liquid into the esophagus during swallowing and then closes to prevent aspiration into the trachea.
The Ciliary Muscle is a circular ring of smooth muscle attached to the lens of the suspensory ligaments.
the tunica media consists almost entirely of smooth muscle why?
The ring of muscle at the entrance to the stomach is the lower esophageal sphincter. This muscle is normally contracted to close the esophagus. At the lower end of the stomach food passes through the pyloric sphincter and into the duodenum of the small intestine.
The ring like muscle that controls the flow from the stomach to the small intestine is called the pylorus or the pyloric sphincter. It is divided into two parts: the pyloric antrum which is connected to the body of the stomach and the pyloric canal which is connected to the beginning of the small intestine (the duodenum).
It is called cardiac muscle, or myocardium.
strap Muscle
It is called involuntary muscle or smooth muscle.