Such waves of contractions are called as peristalsis. This is a regular feature in the digestive tract. When you eat the food, this process is more remarkable. There are local never plexuses that control the regular moments. There is the autonomic nervous system related to hypothalamus of the brain, which also control such movements. You have very good videos on the YouTube about the peristalsis.
peristalsis
by peristalsis which is the rhythmic, involuntary contraction of the smooth muscles in the walls of digestive organs.
Peristaltic movements are wave-like contractions of the muscles in the esophagus, stomach, and intestines that help propel food and nutrients through the digestive system. These movements are essential for moving food along the digestive tract and facilitating digestion and absorption of nutrients.
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).
So nothing can go backwards and get stuck. ... It also maintains the diffusion gradient if food is moving in one direction so the products of digestion are absorbed faster.
The direction of velocity in a moving object indicates the speed and the direction in which the object is moving. Velocity is a vector quantity that includes both magnitude (speed) and direction.
acceleration in a direction that is not parallel to the direction you are moving
acceleration in a direction that is not parallel to the direction you are moving
You can determine the direction in which a comet is moving by observing its motion against the background stars over a period of time. If the comet appears to be moving eastward against the stars, it is moving in a westerly direction in relation to the Earth. If it appears to be moving westward, it is moving in an easterly direction from Earth's perspective.
The word is "stationary" for not moving, and "constant velocity" for moving at a constant speed in the same direction.
Hypothalamus. Answer for A+
Peristalsis is the involuntary muscle contractions that push food through the digestive tract. The rhythmic wave-like motion helps move food through the esophagus, stomach, and intestines to aid in the digestion process. Additionally, gravity and pressure from surrounding organs also play a role in propelling food through the digestive system.