Pharynx Functions and Anatomy Quiz
20 Questions
19 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

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?

<p>Ascending pharyngeal artery (C)</p> Signup and view all the answers

Where is the pharyngeal venous plexus located?

<p>External to the muscles (D)</p> Signup and view all the answers

Which cranial nerve supplies sensory innervation to the pharynx?

<p>CN IX (B)</p> Signup and view all the answers

Which muscle of the pharynx is innervated by CN IX?

<p>Stylopharyngeus (A)</p> Signup and view all the answers

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

<p>CN X (A)</p> Signup and view all the answers

Which artery is a branch of the external carotid artery?

<p>Superior thyroid artery (C)</p> Signup and view all the answers

Where do the veins of the pharyngeal plexus drain into?

<p>Internal jugular vein (C)</p> Signup and view all the answers

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

<p>Laryngopharynx (D)</p> Signup and view all the answers

What is the function of the pharynx?

<p>To conduct food to the esophagus (A)</p> Signup and view all the answers

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

<p>Palatine tonsils (C)</p> Signup and view all the answers

Which muscle forms the posterior pillar of the palatine tonsils?

<p>Palatopharyngeus muscle (C)</p> Signup and view all the answers

Where is the vallecula located?

<p>Between the epiglottis and the tongue (B)</p> Signup and view all the answers

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

<p>Glossopharyngeal nerve (CN IX) (C)</p> Signup and view all the answers

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

<p>Laryngopharynx (C)</p> Signup and view all the answers

Which muscles elevate the pharynx?

<p>Palatopharyngeus, salpingopharyngeus, and stylopharyngeus (B)</p> Signup and view all the answers

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

<p>Pharyngeal constrictors (B)</p> Signup and view all the answers

What is the function of the pharyngeal tonsil?

<p>To protect against infections (A)</p> Signup and view all the answers

Flashcards

Pharyngeal Innervation (CN X)

The vagus nerve (CN X) provides motor innervation to all muscles of the pharynx except the stylopharyngeus.

Inferior Constrictor Muscle

The inferior constrictor muscle originates from cervical connective tissue and inserts into the pharyngeal raphe posteriorly. It's a key player in swallowing.

Palatopharyngeus Muscle

This muscle forms the posterior tonsillar pillar and aids in swallowing.

Pharynx Blood Supply

The ascending pharyngeal artery is the main source of blood supply to the pharynx.

Signup and view all the flashcards

Pharyngeal Venous Plexus

This network of veins lies externally to the pharyngeal muscles, collecting deoxygenated blood.

Signup and view all the flashcards

Pharynx Sensory Innervation

The glossopharyngeal nerve (CN IX) provides sensory innervation to the pharynx, allowing us to feel sensations within it.

Signup and view all the flashcards

Stylopharyngeus Muscle

This muscle, uniquely innervated by CN IX, contributes to pharynx elevation.

Signup and view all the flashcards

Pharyngeal Motor Innervation (CN X)

The vagus nerve (CN X) provides motor innervation to all pharyngeal muscles except the stylopharyngeus.

Signup and view all the flashcards

Superior Thyroid Artery

This branch of the external carotid artery supplies the pharynx, helping to maintain its blood flow.

Signup and view all the flashcards

Pharyngeal Venous Drainage

The pharyngeal venous plexus drains into the internal jugular vein, returning deoxygenated blood to the heart.

Signup and view all the flashcards

Laryngopharynx

Located posterior to the larynx, this section of the pharynx connects to the esophagus.

Signup and view all the flashcards

Pharynx Function

The primary function of the pharynx is to conduct food from the oral cavity to the esophagus.

Signup and view all the flashcards

Palatine Tonsils

Located on the lateral wall of the oropharynx, these tonsils help protect against infections.

Signup and view all the flashcards

Palatopharyngeus Muscle (Posterior Pillar)

This muscle forms the posterior pillar of the palatine tonsils.

Signup and view all the flashcards

Vallecula

The space between the epiglottis and the tongue, where food often sits before entering the pharynx.

Signup and view all the flashcards

Palatine Tonsil Innervation

The glossopharyngeal nerve (CN IX) provides sensory innervation to the palatine tonsils.

Signup and view all the flashcards

Laryngopharynx Entrapment

The laryngopharynx is a common site for food or foreign body entrapment due to its narrow passage.

Signup and view all the flashcards

Pharynx Elevation Muscles

The palatopharyngeus, salpingopharyngeus, and stylopharyngeus muscles work together to elevate the pharynx during swallowing.

Signup and view all the flashcards

Pharyngeal Constrictor Insertion

Pharyngeal constrictors insert into the pharyngeal raphe posteriorly, helping to constrict and move food down.

Signup and view all the flashcards

Pharyngeal Tonsil Function

The pharyngeal tonsil, also known as the adenoid, helps protect against infections in the nasopharynx.

Signup and view all the flashcards

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.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

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.

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser