BIOL 1050H Lecture Notes - Lecture 9: Muscularis Mucosae, Muscular Layer, Lamina Propria
Document Summary
Mucosa: inner layer: epithelium sits on a sheet of connective tissue called the lamina propria, muscularis mucosae: responsible for moving the mucosal layer submucosa, contains many blood vessels. Serosa: protects the tube from abrasion as it moves within the body cavities and, serves as a source of lubrication. Ingestion is the intake of food takes place in the mouth beginning of digestion food is broken down by chewing and starches by amylase. Teeth are specialized to perform various jobs: incisors located in the front are for slicing, canines for stabilizing (and killing for carnivores), premolars and molars are for chewing or grinding. Esophagus: lower esophageal sphincter: keep stomach acid from entering the esophagus stomach, storage chamber for food and a major site of protein digestion, stomach acid breaks down food, kills bacteria, Mucosal layer prevents stomach from ingesting itself by releasing buffers to increase ph.
