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Questions and Answers
Which cranial nerve innervates the 6 muscles of the pharynx?
Which cranial nerve innervates the 6 muscles of the pharynx?
Which muscles of the pharynx originate from cervical connective tissue and insert into the pharyngeal raphae posteriorly?
Which muscles of the pharynx originate from cervical connective tissue and insert into the pharyngeal raphae posteriorly?
Which muscle forms the posterior tonsillar pillar?
Which muscle forms the posterior tonsillar pillar?
Which artery primarily supplies the pharynx?
Which artery primarily supplies the pharynx?
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Where is the pharyngeal venous plexus located?
Where is the pharyngeal venous plexus located?
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Which cranial nerve supplies sensory innervation to the pharynx?
Which cranial nerve supplies sensory innervation to the pharynx?
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Which muscle of the pharynx is innervated by CN IX?
Which muscle of the pharynx is innervated by CN IX?
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Which cranial nerve supplies motor fibers to all other muscles of the pharynx, except the stylopharyngeus?
Which cranial nerve supplies motor fibers to all other muscles of the pharynx, except the stylopharyngeus?
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Which artery is a branch of the external carotid artery?
Which artery is a branch of the external carotid artery?
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Where do the veins of the pharyngeal plexus drain into?
Where do the veins of the pharyngeal plexus drain into?
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Which section of the pharynx is located posterior to the larynx?
Which section of the pharynx is located posterior to the larynx?
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What is the function of the pharynx?
What is the function of the pharynx?
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Which tonsils are located on the lateral wall of the oropharynx?
Which tonsils are located on the lateral wall of the oropharynx?
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Which muscle forms the posterior pillar of the palatine tonsils?
Which muscle forms the posterior pillar of the palatine tonsils?
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Where is the vallecula located?
Where is the vallecula located?
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What is the nerve supply (sensory) of the palatine tonsils?
What is the nerve supply (sensory) of the palatine tonsils?
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What is the common location for food or foreign body entrapment in the laryngopharynx?
What is the common location for food or foreign body entrapment in the laryngopharynx?
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Which muscles elevate the pharynx?
Which muscles elevate the pharynx?
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Which muscle inserts into the corresponding muscle posteriorly, at the pharyngeal raphe?
Which muscle inserts into the corresponding muscle posteriorly, at the pharyngeal raphe?
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What is the function of the pharyngeal tonsil?
What is the function of the pharyngeal tonsil?
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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.
