Resp Physiology

Question 1

What is the pharynx and name its three parts

Answer 1

Muscular tube which connects the nasal cavities and the oesophagus

1) Nasopharynx
2) Oropharynx
3) Larynogopharynx

Question 2

Name the three pharyngeal constrictor muscles and their role

Answer 2

Superior
Middle
Inferior

Contract and constrict the pharyngeal lumen to propel bolus of food towards the oesophagus.

Question 3

What nerve innervates the pharungeal constrictors

Answer 3

VAGUS - cranial nerve 10

Question 4

What are the 3 longitudinal muscles of the pharynx and what do they do?

Answer 4

Stylopharynges
Palatopharyngeus
Salipingopharyngeus
Role is to elevate they hyoid bone and larynx, widen the pharynx during swallowing.

Question 5

What muscles innervates the the pharynx

Answer 5

vagus nerve excpet teh stylophayngeius which is innervated by the glossopharyngea;

Question 6

what is the sensory innervation of the pharynx (each part)

Answer 6

Nasio pharynx = maxillary V2
Oroppharynx - glosopharungeal
Laryngopharynx - VAGUS

Question 7

What is the blood supply of the pharynx

Answer 7

external carotid 
(Main branches = facial, ascending pharyngeal, maxillary and lingual)

Question 8

Venous drainage of the pharynx:

Answer 8

pharyngeal venous plexus which drains into the internal jugular vein