ANP 1107 Lecture Notes - Lecture 1: Hepatic Portal System, Inferior Mesenteric Artery, Abdominopelvic Cavity

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1107
• Professor: Jackie Carnegie

Document Summary

Increase blood flow to the gi tract after a meal b/c it helps carry nutrients and the gi tract has increased muscular action during digestion. Venous return from abdominopelvic region via inferior vena cava; venous return from digestive viscera is indirect via hepatic portal circulation which enters liver into hepatic veins b/c the blood needs to be detoxified. 4 layers of gi tract: mucosa (innermost): secretion of musuc, digestive enzymes, hormones; absorb end products of digestion; protect against infection. Inner circular layer + outer longitudinal layer; thickens to form sphincters at organ-organ junctions to ensure unidirectional flow during digestion (gate keepers: serosa: outermost, protective layer; visceral peritoneum; loose ct covered by single layer of squamous epithelial cells. Esophagus: (thoracic) surrounded by an adventitia instead of serosa; fibrous ct which binds the esophagus to surrounding tissues. Retroperitoneal structures have both a serosa on the side facing the peritoneal cavity and an adventitia on the side against the dorsal body wall.