15. The Law Of Peristaltic Action

Whenever peristalsis occurs, it is always accompanied by reciprocal contraction, with a wave of relaxation running right before the contraction to facilitate the peristalsis, and more or less continued relaxation while ingesting and digesting food.

For those who are not familiar with the term peristalsis, it is that function of digestion which facilitates the transportation of food substances and the accompanying bulk through the alimentary canal, the principal route of the digestive system. This law simply explains the mechanics of that transportive action.