Last lab Flashcards
Three layers of the mucosa
Mucosal epithelium
Lamina propria
Muscularis mucosae
Where is the submucosa?
Beneath the mucosa
Order the layers of the digestive tract
Mucosa
Submucosa
Muscularis externa
Serosa
Mucosal epithelium
Stratified or simple epithelium
Type is different in different regions
Lamina propria
Areolar tissue
Muscularis mucosae
Smooth muscle
Submucosa
Dense irregular connective tissue
Inner layer of smooth muscle
Circular
Outer layer of smooth muscle
Longitudinal
Two tissues types of the serosa
Mesothelium - simple squamous epithelium
Loose connective tissue
Adventitia
Collagen fibres around muscular layer of oral cavity, pharynx, esophagus and rectum
Parietal peritoneum
Peritoneal serosa covering inner surface of abdominal cavity walls
Visceral peritoneum
Peritoneal serosa covering outer surfaces of the organs lying within a cavity
Serosa
Thin layer of connective tissue and simple squamous epithelium
Simple squamous epithelium within serosa
Mesothelium
Mesentery is…
Fused, double sheets of peritoneal membrane
Functions of the oral cavity
Food analysis - sensory info
Lubrication of food
Mechanical processing
Limited digestion of carbohydrates
Functions of the tongue
Mechanical processing of food - compression, distortion + abrasion
Manipulation -> assist chewing
Sensory analysis - touch, temp., taste
Secretion of mucins + enzymes for fat digestion
2 types of cells in salivary glands
Mucous
Serous
Parts of the teeth
Crown = top Neck = middle (at top of gum) Root = bottom
Palatal muscles function
Raise soft palate + adjacent portions of the pharyngeal wall
Phases of the swallowing process
Buccal
Pharyngeal
Esophageal
Voluntary phase of swallowing process
Buccal
Compacted mass of chewed food for swallowing
Bolus
Function of the esophagus
Deliver food to stomach
Opening in diaphragm for passage of the esophagus
Esophageal hiatus
Epithelium of esophagus mucosa
Non-keratinised stratified squamous epithelium
Glands in the submucosa of the esophagus
Esophageal glands
Digestive functions of the stomach
Storage of ingested food
Mechanical breakdown of food
Chemical digestion of food by acids + enzymes
What leaves the stomach?
Chyme
What cavity is the stomach in?
Peritoneal
Mucosal epithelium of the stomach
Simple columnar
Function of stomach mucosal epithelium
Produce mucus
Four layers of the stomach
Mucosa
Submucosa
Muscularis externa
Serosa
Mesenteries of the stomach
Greater omentum
Lesser omentum
Location of greater omentum
Hands from greater curvature of the stomach
Attachments of lesser omentum
Hepatogastric ligament - connects liver to the lesser curvature of the stomach
Hepatogastric ligament
Connects liver to the lesser curvature of the stomach
Lesser omentum
Rugae
Folds of the stomach
Function of rugae
Allow expansion of stomach lumen
Three sections of the small intestine
Duodenum
Jejenum
Ileum
Functions of the small intestine
90% of nutrient absorption
Enzymatic digestion
Buffering pH of chyme in duodenum
Three features increasing the surface area of the small intestine
Plicae
Villi
Microvilli
Four layers of intestinal wall
Mucosa
Submucosa
Muscularis externa
Serosa