NFS382H1 Lecture Notes - Lecture 3: Muscularis Mucosae, Myenteric Plexus, Submucous Plexus
Document Summary
Malfunction in any of the primary or accessory organs could affect the absorption of micronutrients. The structures of the digestive tract & the digestive process. Main structures: oral cavity, esophagus, stomach, small & large intestines, pancreas, liver, gallbladder. Four layers of the lumen: mucosa: epithelium, lamina propria, muscularis mucosa, submucosa: connective tissue, lymphoid tissue, submucosal plexus, muscularis externa: circular/longitudinal smooth muscle, myenteric plexus, serosa or adventitia: connective tissue, visceral peritoneum. Mechanical digestion: among elderly: not eating as many fruits and vegetables due to not chewing as much. For (cid:271)a(cid:271)ies a(cid:374)d (cid:272)li(cid:374)i(cid:272)al situatio(cid:374)s (cid:449)here the(cid:455) (cid:272)a(cid:374)"t prote(cid:272)t their own airway: fed by iv. Babies extrusion reflex in the first few months preventing intake of solid foods. Some issues to consider for class: dental health, sucking and extrusion reflex in infants. Moves bolus from oral cavity to stomach. Selected diseases and conditions of esophagus gastroesophageal reflux disease (gerd: reflux of acid into the esophagus. Food"s (cid:374)ot (cid:272)leared fast e(cid:374)ough fro(cid:373) the esophagus.
