Pharynx and Esophagus

Question 1

Compartments

Answer 1

-interior of mouth and throat
-Food and air passage

Question 2

Regions

Answer 2

Nasopharynx

Oropharyngeal= Oropharynx + Hypopharynx

Question 3

Superior, Middle, and Inferior Pharyngeal Constrictors

Answer 3

Location: Oropharyngeal

Function: Collapses the oropharynx and hypopharynx

Question 4

Larynx

Answer 4

Function:
-During swallowing, musculature contracts and moves trachea up and forward–>opens upper esophageal sphincter
-Separates esophagus and trachea

Question 4

Upper Esophageal Sphincter(UES)

Answer 4

-Made of skeletal muscle
-High pressure(40-100mmHg)
-Closed
-PNS input
-Inspiration, cough, sneeze: contracts tighter

Question 5

Lower Esophageal Sphincter(LES)

Answer 5

-Less defined compared to UES
-Weak pressure 10-12mmHG
-smooth muscle
-Surrounded by diaphragm
-inspiration, cough, sneeze, increase of gastric load: INCREASE in TONE

Question 6

Esophagus

Answer 6

-Transit tube
-10-12 inches
-Upper 1/3: skeletal muscle Middle 1/3: mix Lower 1/3: smooth muscle