Evidence: Bernoulli's Principle in the Colon

 
Yoshiharu Uno, MD, PhD 

When liquid is injected from cecostomy,

The liquid will flow without air moving.

https://www.youtube.com/watch?v=U5Cwgr5jxM8

 Please watch the motion of 3 to 7 seconds of the movie.
 

You can see that the velocity of the narrow lumen is faster than the wide lumen.

Colonic air is slower than liquid

Even if there is no contraction of the intestinal tract, liquid flows quickly.

This is evidence that fluid in the colon flows even if the colon does not contract.