Smooth muscles. These muscles are not striated and are involuntary.
the smooth muscle
Smooth muscles in the wall of an esophagus move food downward with a squeezing action. These waves of muscle contractions move food through the entire digestive tract. This process is called peristalsis.
Peristalsis
The muscle action that mixes chyme with digestive juices throughout the digestive system is called Peristalsis. Peristalsis are wave-like of contractions and expansions of muscles. The muscles help to move the bolus (food) through the digestive tract. Peristalsis are located all over the digestive tract.
Peristalsis
Peristalsis who ever asked this is an idiot just look it up on the internet or in a book
Segmentation is a muscle action that mixes chyme with digestive juices, while Peristalsis is a muscle action that moves food through the digestive system.
Peristalsis is the involuntary muscle action of the alimentary canal. It involves wave-like contractions that push food along the digestive tract, allowing for the process of digestion and absorption to occur.
Your digestive system performs the complex jobs of moving and breaking down food. Material is moved through the digestive system by wave like contractions of smooth muscles. This musculaur action is called peristalsis (pehr-ih-stawl-sihs).
Peristaltic action is required by humans and similar animals which ingest and digest their food supplies in similar fashion. It is a pattern of muscular action along the intestinal walls and other parts of the digestive and excretory systems. The muscular action comprises "squeezing" of the contents so that they pass along the flexible, tubular intestine, whilst the other action creates lengthening and shortening of the "tube". This causes the contents of the "tube" to be passed along and ultimately excreted when you "have to go" to the toilet. As to what would change, that's a very theoretical question, the short answer to which is "they would die out", but this will not happen because natural development of species has designed the human body to work far more cleverly.
There are smooth muscles in the wall of an esophagus that move food downward with a squeezing action. These waves of muscle contractions move food through the entire digestive tract causing peristalsis.
The process of peristalsis includes the sequential movement of muscles around the exterior of the esophagus, squeezing food toward the stomach. A similar action within the intestines is called catastalsis.