Pharynx Functions and Anatomy Quiz

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Questions and Answers

Which cranial nerve innervates the 6 muscles of the pharynx?

CN III

CN IX

CN X (correct)

CN V

Which muscles of the pharynx originate from cervical connective tissue and insert into the pharyngeal raphae posteriorly?

Inferior constrictor (correct)

Superior constrictor

Palatopharyngeus

Middle constrictor

Which muscle forms the posterior tonsillar pillar?

Palatopharyngeus (correct)

Stylopharyngeus

Salpingopharyngeus

Inferior constrictor

Which artery primarily supplies the pharynx?

Ascending pharyngeal artery Signup and view all the answers

Where is the pharyngeal venous plexus located?

External to the muscles Signup and view all the answers

Which cranial nerve supplies sensory innervation to the pharynx?

CN IX Signup and view all the answers

Which muscle of the pharynx is innervated by CN IX?

Stylopharyngeus Signup and view all the answers

Which cranial nerve supplies motor fibers to all other muscles of the pharynx, except the stylopharyngeus?

CN X Signup and view all the answers

Which artery is a branch of the external carotid artery?

Superior thyroid artery Signup and view all the answers

Where do the veins of the pharyngeal plexus drain into?

Internal jugular vein Signup and view all the answers

Which section of the pharynx is located posterior to the larynx?

Laryngopharynx Signup and view all the answers

What is the function of the pharynx?

To conduct food to the esophagus Signup and view all the answers

Which tonsils are located on the lateral wall of the oropharynx?

Palatine tonsils Signup and view all the answers

Which muscle forms the posterior pillar of the palatine tonsils?

Palatopharyngeus muscle Signup and view all the answers

Where is the vallecula located?

Between the epiglottis and the tongue Signup and view all the answers

What is the nerve supply (sensory) of the palatine tonsils?

Glossopharyngeal nerve (CN IX) Signup and view all the answers

What is the common location for food or foreign body entrapment in the laryngopharynx?

Laryngopharynx Signup and view all the answers

Which muscles elevate the pharynx?

Palatopharyngeus, salpingopharyngeus, and stylopharyngeus Signup and view all the answers

Which muscle inserts into the corresponding muscle posteriorly, at the pharyngeal raphe?

Pharyngeal constrictors Signup and view all the answers

What is the function of the pharyngeal tonsil?

To protect against infections Signup and view all the answers

Study Notes

Pharynx Anatomy and Function

The pharynx has 6 muscles, which are innervated by the cranial nerve IX (glossopharyngeal nerve).
The muscles of the pharynx that originate from cervical connective tissue and insert into the pharyngeal raphae posteriorly are the constrictors.
The posterior tonsillar pillar is formed by the palatopharyngeus muscle.
The pharynx is primarily supplied by the ascending pharyngeal artery.
The pharyngeal venous plexus is located in the outer layer of the pharyngeal wall.

Nerve Supply

The cranial nerve IX (glossopharyngeal nerve) supplies sensory innervation to the pharynx.
The stylopharyngeus muscle is innervated by CN IX.
The vagus nerve (CN X) supplies motor fibers to all other muscles of the pharynx, except the stylopharyngeus.

Blood Supply and Drainage

The ascending pharyngeal artery is a branch of the external carotid artery.
The veins of the pharyngeal plexus drain into the internal jugular vein.

Pharyngeal Subdivisions and Functions

The laryngopharynx is the section of the pharynx located posterior to the larynx.
The pharynx's function is to facilitate swallowing and speaking.
The palatine tonsils are located on the lateral wall of the oropharynx.
The palatopharyngeus muscle forms the posterior pillar of the palatine tonsils.
The vallecula is located between the epiglottis and the base of the tongue.

Additional Facts

The nerve supply (sensory) of the palatine tonsils is by the glossopharyngeal nerve.
A common location for food or foreign body entrapment in the laryngopharynx is at the piriform fossa.
The pharynx is elevated by the constrictors and elevator muscles.
The superior constrictor muscle inserts into the corresponding muscle posteriorly, at the pharyngeal raphe.
The function of the pharyngeal tonsil is to aid in the production of lymphocytes.

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Description

Test your knowledge of the pharynx and its functions with this quiz! Explore the different sections and functions of the nasopharynx, oropharynx, and laryngopharynx. Learn about the anatomical features and openings within the nasal cavity and discover the role of the pharynx in conducting food and air.