GI 1F- Esophagus and Deglutition Flashcards
The esophagus connects the _____ to the _____
pharynx to the stomach
Where does the esophagus begin
in the neck at the pharyngoesophageal junction (C5-6 vertebral interspace at the inferior border of the cricoid cartilage)
The esophagus has what type of epithelium
non-keratinized stratified squamous
Esophageal submucosa includes what structures involved in lubrication
esophageal glands
What layer is not found in the esophagus that is found in the GI tract?
serosal outer layer
What includes especially large venous space?
submucosal vascular plexus
Where does the mid and lower esophagus, and submucosal venous plexus drain?
Collaterals of the left gastric vein, a branch of the portal vein
submucosal venous spaces, along with all other “draining” veins of the mid to lower esophagus may enlarge to form____
esophageal varices
What causes an increased risk of esophageal varices rupture?
portal hypertension usually due to cirrhosis
What does deglutition mean?
swallowing
What does a dentist call his x-rays?
Tooth- Pics
What are the three phases of swallowing?
- Oral or voluntary
- pharyngeal
- esophageal
Oral phase
Voluntary action of collecting the oral contents on the tongue and propelling them backward to the pharynx
Pharyngeal phase
Wave of involuntary contraction in the pharyngeal muscles that pushes the material into the esophagus as the upper esophageal sphincter relaxes and opens
Esophageal
Food enters the esophagus and peristalsis takes over
