ANATOMY 328 Lecture 7: 3:3 lecture notes
Document Summary
Abdominopelvic quadrants: see diagram, know what organs are in each quadrant. Peritoneum, peritoneal cavity, and mesenteries: visceral peritoneum: covers the external surfaces of most digestive organs, parietal peritoneum: lines the body wall, perineal cavity: space between the visceral peritoneal and parietal peritoneum; contains lubricating serous fluid. Digestive system: hollow tube ~22-25 feet long, organs are divided into 2 main groups, alimentary canal, mouth, pharynx, esophagus, stomach, small intestine, large intestine, accessory organs, teeth, tongue, gallbladder, salivary glands, liver, pancreas. Muscularis externa: two layers of smooth muscle, inner circular layer: allows us to do peristalsis and segmentation; squeezes and makes lumen smaller, outer longitudinal layer: shortens the gi tube (helps move food down the gi tract. Works with inner circular layer: nerve fibers are associated ganglia between the two layers of muscles is called the myenteric nerve plexus (nerves activated by stretching)
