2. Esophagus

Question 1

Identify 1

Answer 1

1. Inferior pharyngeal constrictor muscle
2. Cricopharyngeal (muscle) part of inferior pharyngeal constrictor muscle
3. Circular muscle layer with sparse longitudinal fibers
4. Lateral mass of longitudinal muscle
5. Window cut in longitudinal muscle layer (revealing circular muscle layer)

Question 2

Identify 2

Answer 2

2. Cricopharyngeal (muscle) part of inferior pharyngeal constrictor muscle

Question 3

Identify 3

Answer 3

3. Circular muscle layer with sparse longitudinal fibers

Question 4

Identify 4

Answer 4

4. Lateral mass of longitudinal muscle

Question 5

Identify 5

Answer 5

5. Window cut in longitudinal muscle layer (revealing circular muscle layer)

Question 6

The esophagus is a muscular canal that extends from the (1)___ to the (2)___

Answer 6

1. pharynx
2. stomach

Question 7

2 planes of muscular coat of esophagus

Answer 7

1. an external plane of longitudinal fibers
2. an internal plane of circular fibers.

Question 8

The esophageal muscle transitions from (1)___ to (2)__ muscle as it descends from the pharynx to the stomach.

Answer 8

1. skeletal
2. smooth

Question 9

The esophagus has 4 narrowed regions along its length where a swallowed object may become lodged or erode the mucosa as it passes.
→ What are these 4 regions?

Answer 9

1. the pharynx becomes continuous with the proximal esophagus
2. the aortic arch crosses the esophagus
3. the esophagus is compressed by the left main bronchus
4. the esophagus passes through the diaphragm (esophageal hiatus)

Question 10

The esophagus has 4 narrowed regions along its length where a swallowed object may become lodged or erode the mucosa as it passes.

1. the pharynx becomes continuous with the ___
2. the ___ crosses the esophagus
3. the esophagus is compressed by the ___
4. the esophagus passes through the ___

Answer 10

1. proximal esophagus
2. aortic arch
3. left main bronchus
4. diaphragm (esophageal hiatus)