by peristalsis which is the rhythmic, involuntary contraction of the smooth muscles in the walls of digestive organs.
Sphincter muscles. They are smooth muscles found in various parts of the body, such as the digestive system and urinary tract, and control the opening and closing of tubes or openings.
The gastrointestinal tract contains sphincters, which are circular muscles that regulate the movement of material through the digestive system. Some examples of sphincters in the gastrointestinal tract include the lower esophageal sphincter, pyloric sphincter, and anal sphincter.
There are two sphincters, one at the end of the esophagus / top of the stomach, and the second at the bottom of the stomach / beginning of the small intestines, which keep digestive contents moving downward through the beginning of the digestive tract.
Sphincters (circular muscles)
Circular muscles are called sphincters, there are many different sphincter muscles in the human body.
Proper rings are only formed by smooth mucle and are called sphincters. NB not all sphoncters are proper ring.
Sphincters
sphincters
Sphincters
Peristalsis is the contraction of smooth muscles that cause food to move throughout the digestive tract.
40 including the eye, mouth, esophagus, urethra, stomach, upper intestiens, lower intestines, anus etc.
Muscles provide movement, especially the skeletal muscles. The smooth muscles in our organs produce movement called peristalsis or tonic contraction which holds sphincters closed.