Digestive System - Module 13 Flashcards
Digestive System
This system is responsible for digestion and absorption of nutrients, and excretion of waste products as feces
Digestive System
6 major organs of Digestive Tract
Mouth > Esophagus > Stomach > Small Intestine > Large Intestine > Anus
Histological Layer of Digestive System
- Mucosa
- Submucosa
- Muscularis
- Serosa
Layers of Mucosa
Epithelium, Lamina propria, muscularis mucosae
Layers of Submucosa
Submucosal Plexus (Meissner’s Plexus)
Layers of Muscularis
Myenteric Plexus (Auerbach’s Plexus)
True or False
Auerbach’s Plexus : Myenteric Plexus
Meissner’s Plexus : Submucosal Plexus
True
Histology of Mouth’s Mucosa
Non-keratinized Stratified Squamous Epithelium
Histology of Pharynx’s Mucosa
Non-keratinized Stratified Squamous Epithelium
Histology of Esophagus’ Mucosa
Non-keratinized Stratified Squamous Epithelium
Histology of Stomach’s Mucosa
Simple Columnar Epithelium
Histology of Small Intestine’s Mucosa
Simple Columnar Epithelium
Histology of Large Intestine’s Mucosa
Simple Columnar Epithelium
Histology of Anus’ Mucosa
Non-keratinized Stratified Squamous Epithelium
Histology of Esophagus’ Submucosa
Submucosal Mucous Glands
Histology of Duodenum’s Submucosa
Brunner’s Glands
Histology of Ileum’s Submucosa
Peyer’s Patches
Histology of Esophagus’ Muscularis
2 smooth muscle layers; circular and longitudinal
Histology of the Stomach’s Muscularis
3 smooth muscle layers; Oblique, Circular, Longitudinal
Histology of Esophagus’ Serosa
Adventitia
Histology of Stomach’s Serosa
Visceral Peritoneum
What tissue makes up the adventitia of the esophagus
Loose Areolar Connective Tissue
Division of Stomach’s Histological regions
- Cardiac Region
- Fundic Region
- Pyloric Region
Cells found in the fundic region
- Mucous Neck Cells
- Parietal (Oxyntic) Cells
- Chief (peptic/zymogen)Cells
- Enteroendocrine Cells
- Undifferentiated Cells
True or False, Submucosal layer of stomach (fundic region) contains blood vessels, lymphatics, and Meissner’s Plexus
True
Mucosal Characteristics of this organ are:
1. Villi & Microvilli
2. Plicae circularis
3. few goblet cells
4. Crypts of Lieberkuhn
Small Intestine
What segment of intestine has the presence of Brunner’s Glands in its submucosa
Duodenum
True or False, Brunner’s Glands is also present in Jejunum
False, it is absent in Jejunum
This segment of Small intestine has the presence of Lymphoid organs called ________
Ileum, Peyer’s Patches
This organ has no Plicae circularis and villi, but has microvilli and large number of Goblet Cells
Large Intestine
True or False, Crypts of Lieberkuhn is present in Large Intestine
True
This is a small blind-ending diverticulum with large accumulations of lymphoid tissues in lamina propria
Vermiform Appendix
This gland lacks taenia and appendices of epiploicae, and a continuous coat of longitudinal muscle is present
Rectum
What epithelium lines the Anal Canal
Upper Part: Simple Columnar Epithelium
Middle Part: Non-keratinized Stratified Squamous Epithelium
Lower Part: Covered by true skin
Is the submucosal fold between anal columns
Pectinate Line
True or False, Muscularis externa circular muscle forms voluntary internal anal sphincter
False, it forms involuntary internal anal sphincter
