What is responsible for the peristalsis that occurs in the digestive tract?

Peristalsis moves food through the digestive system. When muscles contract, food is pushed to an area of relaxation. The muscles above the food contract further, pushing the food along. It occurs in the esophagus and intestines.

this protocol describes a detailed procedure for intracellular flow cytometry staining.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: