Podcast
Questions and Answers
Which of the following valves is responsible for regulating the passage of food from the stomach into the duodenum?
Which of the following valves is responsible for regulating the passage of food from the stomach into the duodenum?
What is the name of the structure that connects the duodenum to the liver, allowing for the transfer of nutrients and bile?
What is the name of the structure that connects the duodenum to the liver, allowing for the transfer of nutrients and bile?
Which segment of the duodenum is also known as the horizontal segment?
Which segment of the duodenum is also known as the horizontal segment?
What is the name of the valve that separates the small intestine from the large intestine?
What is the name of the valve that separates the small intestine from the large intestine?
Signup and view all the answers
Which muscle is responsible for maintaining continence in the rectum?
Which muscle is responsible for maintaining continence in the rectum?
Signup and view all the answers
What is the name of the structure that connects the duodenum to the pancreas, allowing for the transfer of enzymes?
What is the name of the structure that connects the duodenum to the pancreas, allowing for the transfer of enzymes?
Signup and view all the answers
Which segment of the colon is S-shaped?
Which segment of the colon is S-shaped?
Signup and view all the answers
What is the name of the structure that connects the esophagus to the stomach?
What is the name of the structure that connects the esophagus to the stomach?
Signup and view all the answers
Study Notes
Pathway of a Bolus of Food through the Gastrointestinal Tract
- The bolus of food enters the esophagus through the upper esophageal sphincter
- The bolus exits the esophagus through the lower esophageal sphincter and enters the stomach through the cardia
Stomach Region
- The bolus moves through the fundus of the stomach
- The bolus then moves through the pyloric antrum (wider end of the stomach)
- The bolus moves through the pyloric canal (thinner end of the stomach)
- The bolus exits the stomach through the pyloric sphincter/valve into the duodenum
Duodenum Region
- The partially digested food/liquids or chyme enters the superior segment of the duodenum (1st part)
- The duodenal bulb connects to the liver via the hepatoduodenal ligament
- Nutrients are transferred from the small intestine to the liver via the bile duct, hepatic artery, and portal vein
- The chyme moves down into the descending segment of the duodenum (2nd part)
- The pancreatic duct connects to the pancreas, allowing enzymes to help break down the chyme
- The common bile duct and pancreatic duct enter the descending segment through the major duodenal papilla
- The minor duodenal papilla allows for accessory pancreatic ducts to enter the descending segment
Later Regions of the Small Intestine
- The chyme moves into the transverse segment of the duodenum (3rd part), also known as the horizontal segment
- The chyme moves into the ascending segment of the duodenum
- The chyme moves through the duodenojejunal flexure into the jejunum
- The chyme moves from the jejunum into the ileum
Large Intestine Region
- The chyme moves from the ileum into the cecum through the ileocecal valve
- The chyme moves up the ascending colon, across the transverse colon, down the descending colon, around the S-shaped sigmoid colon, and into the rectum through muscle contractions
Anus Region
- The internal anal sphincter maintains continence
- The external anal sphincter muscle allows for the release of feces
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the journey of a bolus of food through the esophagus, stomach, and other regions of the gastrointestinal tract. Learn about the different sphincters and parts of the stomach involved in the process.
