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: The muscularis is responsible for segmental contractions and peristaltic movement in the GI tract. The muscularis is composed of two layers of muscle: an inner circular and outer longitudinal layer of smooth muscle.
Peristalsis is the regular contracting and relaxing of the  digestive tract that keeps food moving throughout the system. It is  controlled by muscles of muscles in the digeâ¦stive system, such as  the ones in the throat, stomach, and intestines.