Question

What is the involuntary muscle that moves food through the digestive system?

Answer 1

Smooth muscles in the wall of gastro-intestinal tract causes peristalsis to move food in the digestive system. There are circular and longitudinal muscle layers all along the gut, with an additional oblique layer of smooth muscle in stomach.

Explanation:

Peristalsis is the involuntary wave like muscle movement that moves food through the digestive system. Alternate, segmental muscle contractions and relaxations occur in walls of oesophagus, stomach, small and large intestines.