What is the shape of the stomach?
Empty, hollow, J-shaped
The stomach’s unique shape aids in its functions related to digestion.
Name the three sections of the stomach.
- Fundus
- Body
- Pylorus
Each section has specific roles in the digestive process.
What are rugae in the stomach?
Folds inside stomach surface that allow stretching/expansion
Rugae enable the stomach to accommodate varying amounts of food.
What is the function of the pyloric sphincter muscle?
Controls opening into duodenum and prevents back-flow of chyme into stomach
This muscle is crucial for regulating the passage of digested food.
List the two main functions of the stomach.
- Storage
- Churning (mechanical digestion)
Churning mixes food with hydrochloric acid (HCl) for digestion.
What is the role of mucus secreted in the stomach?
Protects stomach from self-ingestion by HCl
Mucus lies in folds of rugae when the stomach is empty.
True or false: Invading microbes are commonly found in the stomach due to the presence of HCl.
FALSE
The acidic environment of the stomach rarely allows for the survival of invading microbes.
What is formed when bolus mixes with HCl?
Chyme
Chyme is the semi-liquid mixture that moves from the stomach to the duodenum.
What are the layers of the stomach wall?
- Serosa
- Muscularis (Longitudinal, Circular, Oblique muscle layers)
- Submucosa
- Mucosa
These layers contribute to the stomach’s structure and function.
