Peristalsis
Related Topics:
More Lessons for Biology
Math Worksheets
A collection of videos and experiments that are suitable for Biology.
How the Body Works : The Alimentary Canal - Peristalsis
The alimentary canal extends from the pharynx to the rectum. When a ball of food enters the gullet, circular muscle fiber contract behind it and relax in front of it. Outer longitudinal fibers produce wavelike movements along the length of the tube. These two actions continue to push food through all the alimentary canal. The involuntary process is called peristalsis. When this action is reversed, it is called antiperistalsis and produces vomiting.
Digestion - 2/3 - Peristalsis
Try out our new and fun Fraction Concoction Game.
Add and subtract fractions to make exciting fraction concoctions following a recipe.
There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics
of fraction addition and subtraction or challenge yourself with the insane level.