by peristalsis
The digestive system has smooth muscle through out it, and they help move the food.
Digestive
Muscle motion in your digestive system called Peristalsis helps the food to travel through your digestive system.
muscles
SMOOTH muscle
Yes, by peristaltic movement.
peristalsis
absorption
SMOOTH muscle
Fiber
Aerial A Harris
Yes, the muscles squeeze the food through the digestive system :)