Final answer:
Peristalsis is the result of contraction in smooth muscle tissue, which occurs in the walls of hollow organs like the digestive system. It is an involuntary process.
Step-by-step explanation:
Peristalsis is the result of contraction in smooth muscle.
Smooth muscle tissue occurs in the walls of hollow organs, such as the intestines and stomach, and it contracts in a wave-like motion to push food through the digestive system.
Peristalsis is an involuntary process, meaning it occurs without conscious control.