MEDRADSC 1B03 Lecture Notes - Lecture 19: Thoracic Cavity, Abdominal Cavity, Salivary Gland

• School: McMaster University
• Department: Medical Radiation Sciences
• Course: MEDRADSC 1B03
• Professor: Sandra Charbonneau

Document Summary

Mouth: main jobs are mastication & salivary gland breakdown of food; chemical & mechanical. Stomach: mix & dilute chyme; gastric secretions to digest proteins, add intrinsic factor; very acidic. Si: bile emulsifies fat; pancreatic secretions; intestinal secretions digest fat, protein, & carbs; absorption of nutrients. Accessory structures: salivary glands, liver, gallbladder, pancreas; addition of secretions from structures that help w the breakdown of food as it moves through the digestive tract. 3 holes in the diaphragm: aorta, ivc, & esophagus; loosely attaches around the tubes. Part of the stomach is elevated & protrudes through the opening in the diaphragm into the thoracic cavity. Malalignment of the esophagus & the diaphragm. A portion of stomach & ge (gastroesophageal) junction protrudes up into the thoracic cavity. Only happens when individual is in a supine position; moved by gravity; standing back up fixes it: rolling or paraesophageal. Whole fundus of the stomach moves up & stays there.