1 In-text citations in parenthesis, with only the author's last name and page number included (Smith, p. 4). 2  Double-spaced lines, but with no extra line breaks between each citation. 3  Footnotes (superscripted) also used to provide non-essential information.
Muscularis Extema is the layer of the digestive tract wall that is responsible for peristalsis.
Peristalsis is the process of the movement of food through the GI tract. So, digestion begins in the mouth when you chew and ends in the large intestine 18 to 20 hours later. As food passes through the GI tract, it mixes with digestive juices, causing large molecules of food to break down into smaller molecules.