A&P - Chapter 38 (Part 3) Flashcards
(32 cards)
How long is the esophagus?
25cm
Esophagus
Muscular, mucus-lined tube
What does the esophagus connect?
The pharynx with the stomach
- sphincters at both ends
What do peristaltic actions do?
Pushes food to the stomach
What facilitates the passageway for food?
Mucous secretion
What happens to the esophagus when the food it not moving through?
It collapses
Where is the stomach located?
In upper abdominal cavity, under the diaphragm and liver
What is the stomach?
A temporary ‘storage’ sac for chewed food
What begins in the stomach?
Chemical digestion of proteins
When does the stomach expand?
After a meal
- 1-1.5L capacity
What are the 4 parts of the stomach?
- Cardia
- Fundus
- Body
- Pylorus
Cardia
Collar-like region at junction with esophagus
Fundus
Enlarged portion to the left and above the opening of the esophagus into the stomach
Body
Central portion of the stomach
Pylorus
Lower part of the stomach
Lesser curvature
Upper right curve of the stomach
Greater curvature
Lower left curve of the stomach
What is the cardiac sphincter also known as?
The lower Esophageal Sphincter
Cardiac sphincter
Ring of muscle at end of esophagus that prevents stomach contents from refluxing back into esophagus
What causes hiatal hernia?
Weakening of ‘hiatus’
- opening in diaphragm for esophagus
What happens to the end of the esophagus with hiatal hernia?
It can bulge
What can part or all of the stomach do in hiatal hernia?
Bulge upwards
What can hiatal hernia lead to?
GERD
What does the pyloric sphincter control?
Emptying of stomach into the duodenum
