Lecture 20 Flashcards
What is the primary functions of the GI system?
- Motility
- Secretion
- Digestion
- Absorption
What closes the GI system from both ends?
Sphincters
What is the epithelium in the Mouth, cavity and esophagus
Stratified squamous
What epithelium is in the stomach and small/large intestine
Simple columnar
What do goblet cells contain?
- Columnar epithelium
- Goblet shape
- Apical mucous granules
- Basal nucleus
What are the four layers of the Gut tube
- Mucosa
- Submucosa
- Muscularis
- Adventitia
The mucosa consists of the
- Epithelium
- Lamina propria (FCT)
- Muscularis mucosae
The submusoca contains:
- Glands
2. Blood vessels
Secretion in the submucosa is regulated by the…
Submucosal nerve plexus, which is part of the Enteric Nervous System.
The muscularis consists of…
Smooth muscle.
What two layers of the muscularis
- Inner circular
2. Outer longitudinal
The myenteric plexus is part of the ____ system
ENS
Where is the myenteric plexus located?
In between muscle layers
The adventitia is the ________ layer of the gut tube
outermost
What type of membrane is the peritoneum?
Serous
What is between the parietal and visceral layer of the peritoneum?
A fluid filled space
Where is the retroperitoneal located?
Posterior to the peritoneum
What is the mesentery?
A double layer of visceral peritoneum that connects organ to body wall
What is the omenta?
A double layer of visceral peritoneum that connects an organ to another organ
What 3 pairs connect to the oral cavity via ducts?
- Parotid - serous fluid with amylase
- Sublingual - Mucous only
- Submandibular - Mixes
In salivary gland, clusters of cells are called
Acinus
What do acinar cells secrete?
Enzymes - amylase
What do duct cells secrete?
Bicarbonate
Where is the esophagus located?
Posterior to the trachea. It extends from the pharynx to the stomach
What type of muscle is in the first 1/3 of the esophagus?
Skeletal muscle
