Semi finals DIGESTIVE SYSTEM Flashcards
3 parts of the digestive system
Oral cavity
Alimentary Canal or Tract
Associated Glands
Give the function of oral cavity
Ingestion of food
Breakdown of food
Deglutition or swallowing of food
It is the continuation of the oral cavity
Alimentary Canal or Tract
The lumen of alimentary canal is lined by the epithelium (the outer layer)
Mucosa of Alimentary Tract
Deep in a loose connective tissue known as the
Lamina propria
Surrounded by the dense irregular fibroelastic connective tissue
Submucosa of AT
In submucosa The layer houses through the glands except _______ and _______
Esophagus and Duodenum
In submucosa you will see the glands and lymp vessels known as the
Meissner’s submucosal plexus
Usually composed of the inner circular and outer longitudinal smooth muscle layer
Muscularis Externa
Composed of thick muscular layer responsible for peristaltic activity or contraction
Muscularis Externa
It is the region of alimentary canal which is intraperitoneal invested by peritoneum covering
Adventitia / Serosa
It adheres the body wall and has a dense irregular connective tissue component
Adventitia or Serosa
Musculomembranous that has approximately 25 cm length that conveys the bolus from the oral pharynx to the stomach
Esophagus
It is lined with non keratinized stratified squamous epithelium
Esophagus Mucosa
Contains small mucus secreting gland, the esophageal glands
Esophagus Submucosa
Composed of stratified squamous epithelium
Esophageal Mucosa
It is connected to the fibroelastic lamina propria and a smooth muscle layer composed of the muscularis mucosa
Esophageal Mucosa
Has the basal cell which is composed of mucous cell and serous cell
Esophagus SUBMUCOSA
Flattened apical nuclei with mucinogen granules
Mucos Cell
Round and central nuclei
Serous Cell
The secretory granules in the serous cells known as the
Pepsinogen
The anti-bacterial agent of the serous cells is called
Lysozyme
Composted of skeletal and smooth muscle cells
Esophagus Muscularis Externa
2 layers of Muscularis Externa in Esophagus
Inner circular muscle layer
Outer longitudinal muscle layer
Three histological regions of stomach
Cardia
Fundus and Body
Pylorus
Constitue the most extensive region in the stomach
Fundus and Body
The Mucosal surface of the Stomach
Simple columnar epithelium
Invaginates deeply into the lamina propria– these invaginations are called
Gastric Pits
The mucosa of empty stomach exhibits temporary folds called
Rugae
The lamina propria of the Esophagus continues into the lamina propria of the stomach, where it becomes Filled with _________ and diffused
Gastric Glands
Lymphatic tissue
Two distinct cell types can be identified in the gastric glands
Acidophilic Parietal cells (Oxytic Cells)
Basophilic Chief cells ( zymogenic cells)
Located in the upper portion of the glands
Acidophilic Parietal cells
