Stomach Flashcards
- simple in cats and dogs
- monogastric
- muscular glandular organ interposed between the esophagus and the small intestine
- majority of the digestive tract»_space; abdominal cavity
Stomach
Functions:
1. To act as a reservoir of food
2. To break up the food and mix it with gastric juices
3. To begin the process of protein digestion
Stomach
2 Stomach Surfaces
- Parietal Surface
- Visceral Surface
– in contact with the liver
Parietal surface
– in contact with other organs
Visceral surface
3 Regions of the Stomach
- Fundus
- Cardia
- Pylorus
– long in the convex surface of the stomach; extending from the cardiac portion until reaches the pylorus.
Greater curvature
– short concave portion of the stomach that extends from the cardiac to the pylorus.
Lesser curvature
- opening of the esophagus into the stomach
- in here the cardiac sphincter is seen
Cardia or cardiac ostium
– at the entrance of the stomach
Cardiac sphincter
- epiplon
- attached to the greater curvature
Greater omentum
- blind expanded part of the stomach at the left side.
Fundus
– largest part of the stomach
Body
- distal opening of the stomach
Pylorus
- portion of the stomach distal to the body
Pyloric part
- wide proximal part of the pyloric part
Pyloric antrum
– narrow distal passage
– surrounded by the pyloric sphincter
Pyloric canal
– at the distal end
Pyloric sphincter
– internal folds of the stomach
– mucosa to increase the surface area food, enzymes secreted
Gastric folds or rugae
- found in all parts of the stomach
- secrete mucus to lubricate the food and to protect the stomach from digestive enzymes
Goblet cells
- found in the fundus
- secrete pepsinogen
- breaks down protein to peptide
- precursor to the active enzyme»_space; pepsin
Chief cells
- found within the fundus
- secrete hydrochloric acid
- creates an acid pH which enables pepsin to work effectively
Parietal cells
