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.
A rich network of intrinsic neurons is found in thesubmucosa and between the circular and longitudinal muscle layers and is capable of producing secondary peristalsis. This network communicates to the centralnervous system by means of the vagi, the adrenergic ganglia, and the celiac ganglia (Figure 6).igure 1. Location of the esophagus in the body. Barrett's Esophagus: Introduction Barrett's esophagus is a condition in which columnar cells replace the usual squamous cell in the mucosa of theesophagus.