Lecture 18: GI II Flashcards
Is the Stomach Intra or Retroperitoneal?
Intraperitoneal
Which quadrant is the Stomach in?
The LUQ
Which section of the gut is the stomach in?
The Foregut
What is the stomach vascularized by?
Celiac Trunk
How does the stomach mechanically break down food?
Through mixing and churning using contractions of the muscular wall
How does the the stomach chemically and enzymatically digest food?
Through actions of secreted acid and enzymes
Where does Chyme form?
In the stomach
What is chyme?
The mixture of the bolus and gastric juices
Which part of the Stomach does the Esophagus enter?
The Cardia
What is the Fundus of the stomach do?
Detects when food comes in allowing the rest of the tube in the stomach to know when to secrete enzymes
What is the Pyloric canal continuous with?
The duodenum
What does the Pyloric sphincter do?
Stops chyme from being released into the Duodenum until its ready
What attaches to the greater and lesser curvature of the stomach?
The greater omentum and the lesser omentum
What is the less general name for the greater and lesser Omentum?
The mesentery
What is the Greater Omentum?
An apron that drapes from the greater curvature of the stomach over the abdominal wall organs
What is the Omentum made of?
Two layers of Serosa with lots of fat
What is the immunological function of the Omentum?
It will go wherever there is disease
What is found in the Greater Omentum?
Blood, nerves and lymphoid tissues
How does the Greater Omentum control temperature?
Using the lipid deposits
What are the three muscle layers of the stomach?
Inner Oblique, Middle Circular, Outer Longitudinal
What kind of epithelium goes from the Stomach to the Rectum?
Simple Columnar Epithelium
What are Rugae?
Folds in the stomach created by the muscle layers that stretch when there is food in it
What are the 5 Gastric gland secretory cells?
- Surface mucous
- Mucous neck
- Parietal
- Chief
- Neuroendocrine
What are the secretory cells at the lumen of the stomach?
Surface Mucous Cells