{"id":157,"date":"2016-10-01T11:16:17","date_gmt":"2016-10-01T11:16:17","guid":{"rendered":"https:\/\/www.therespiratorysystem.com\/?p=157"},"modified":"2022-09-16T16:33:17","modified_gmt":"2022-09-16T16:33:17","slug":"pharynx","status":"publish","type":"post","link":"https:\/\/www.therespiratorysystem.com\/nl\/pharynx\/","title":{"rendered":"Farynx"},"content":{"rendered":"<h2>What is the Pharynx<\/h2>\n<p>Pharynx is the 4-5 inches long semicircular fibromuscular tube, commonly referred to as the throat <sup>[1]<\/sup> that connects the <a href=\"https:\/\/www.therespiratorysystem.com\/nasal-cavity\/\">nasal cavity<\/a> to the larynx, and the oral cavity to the esophagus <sup>[2, 3]<\/sup>.<!--more--><\/p>\n<h2>Where is the Pharynx Located<\/h2>\n<p>Located just below the nasal and oral cavities and before the larynx and esophagus, the pharynx starts at the human skull base, extending to the lower end of the cricoid cartilage <sup>[4]<\/sup>.<\/p>\n<div id=\"attachment_158\" style=\"width: 310px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/www.therespiratorysystem.com\/wp-content\/uploads\/2016\/09\/Pharynx.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-158\" class=\"size-medium wp-image-158\" src=\"https:\/\/www.therespiratorysystem.com\/wp-content\/uploads\/2016\/09\/Pharynx-300x197.jpg\" alt=\"Pharynx\" width=\"300\" height=\"197\" srcset=\"https:\/\/www.therespiratorysystem.com\/wp-content\/uploads\/2016\/09\/Pharynx-300x197.jpg 300w, https:\/\/www.therespiratorysystem.com\/wp-content\/uploads\/2016\/09\/Pharynx-91x61.jpg 91w, https:\/\/www.therespiratorysystem.com\/wp-content\/uploads\/2016\/09\/Pharynx.jpg 700w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-158\" class=\"wp-caption-text\">Pharynx<\/p><\/div>\n<h2>Parts of the Pharynx \u2013 Anatomy and Structure<\/h2>\n<p>It consists of the nasal, oral, and laryngeal divisions <sup>[5]<\/sup>:<\/p>\n<h3>Nasopharynx (Nasal Pharynx)<\/h3>\n<p>It is the uppermost section, located between the skull base and the soft palate <sup>[3]<\/sup>. The adenoids or pharyngeal tonsils are located on its posterior wall <sup>[6]<\/sup>.<\/p>\n<h3>Oropharynx (Oral Pharynx)<\/h3>\n<p>The part after the nasopharynx, the oropharynx is the region behind the base of the tongue, between the soft palate and the <a href=\"https:\/\/www.therespiratorysystem.com\/epiglottis\/\">epiglottis<\/a> <sup>[7]<\/sup>.<\/p>\n<h3>Laryngopharynx<\/h3>\n<p>Also known as the hypopharynx, it is the last section of the pharynx, located between the epiglottis and the cricoid cartilage, continuing into the larynx and esophagus <sup>[4]<\/sup>.<\/p>\n<h3>Muscles of the Pharynx<\/h3>\n<p>The pharynx walls have two types of muscle structures:<\/p>\n<h4>The Outer Circular Layer<\/h4>\n<p>These are positioned as incomplete muscular circles, all innervated by the nervus vagus (vagus nerve) <sup>[5]<\/sup>. There are three circular muscles <sup>[8, 9]<\/sup>:<\/p>\n<ul>\n<li><strong>Superior pharyngeal constrictor<\/strong>, located in the oropharynx<\/li>\n<li><strong>Middle pharyngeal constrictor<\/strong>, located in the laryngopharynx<\/li>\n<li><strong>Inferior pharyngeal constrictor<\/strong>, also located in the Laryngopharynx, divided into the superior (having oblique fibers attaching to thyroid cartilage) and inferior (having horizontally placed fibers attaching to cricoid cartilage) components <sup>[3]<\/sup>.<\/li>\n<\/ul>\n<h4>The Inner Longitudinal Layer<\/h4>\n<p>There are three paired longitudinal muscles in the human pharynx <sup>[10]<\/sup>:<\/p>\n<ul>\n<li><strong>Stylopharyngeus &#8211;<\/strong>\u00a0Extends to the pharynx from the temporal bone\u2019s styloid process<\/li>\n<li><strong>Palatopharyngeus &#8211;<\/strong>\u00a0Extends from the oral cavity\u2019s hard palette<\/li>\n<li><strong>Salpingopharyngeus &#8211; <\/strong>Extends from the Inferior cartilage of the Eustachian tube <sup>[11]<\/sup><\/li>\n<\/ul>\n<p>The vagus nerve innervates the palatopharyngeus and salpingopharyngeus, while the glossopharyngeal nerve innervates the stylopharyngeus <sup>[3]<\/sup>.<\/p>\n<h3>Pharyngeal Blood Supply<\/h3>\n<p><strong>Arterial Supply: <\/strong>Through external carotid artery branches, namely the ascending pharyngeal artery, lingual artery, facial artery and maxillary artery.<\/p>\n<p><strong>Venous Drainage:<\/strong> Performed by the venous pharyngeal plexus that drains into the IJV (internal jugular vein).<\/p>\n<h2>Functions \u2013 What Does the Pharynx Do<\/h2>\n<p>Since it works as the connecting tube between the nasal cavity and larynx, as well as the oral cavity and esophagus, the\u00a0pharynx is an integral part of both the respiratory and digestive systems.<\/p>\n<h3>Functions in the Respiratory System<\/h3>\n<p>Here, its primary purpose is to let inhaled air pass from the nasal cavity to the larynx, windpipe and then the <a href=\"https:\/\/www.therespiratorysystem.com\/lungs\/\">lungs<\/a> <sup>[6]<\/sup>. The passage connecting the oral and nasal pharynges, called isthmus, allows humans to breathe both through the nose and mouth <sup>[12]<\/sup>.<\/p>\n<p>The epiglottis, located at the end of the oropharynx keeps the passage to the esophagus covered, so the air does not enter into the digestive system. The Eustachian tubes act as a connection between the pharynx and middle ear, helping in equalizing the pressure of air on the eardrum <sup>[12]<\/sup>.<\/p>\n<h3>Functions in the Digestive System<\/h3>\n<p>The consecutive contractions of the circular muscles of the pharynx help the ingested foods to pass through the lumen into the esophagus <sup>[10]<\/sup>. The longitudinal muscles contribute to widening the pharynx, elevating the larynx during the process of swallowing <sup>[3]<\/sup>.<\/p>\n<h3>Functions in Speech<\/h3>\n<p>The pharynx works with the other speech organs and muscles to produce initial sounds, while it also plays the role of a resonating organ.<\/p>\n<h2>Conditions Associated with Pharynx<\/h2>\n<ul>\n<li><strong>Pharyngitis<\/strong>, an inflammatory condition causing swelling, pain during swallowing, redness, and scratchiness, along with white patches in the throat <sup>[13]<\/sup><\/li>\n<li><strong>Tonsillopharyngitis<\/strong>, a viral (or bacterial) throat infection causing pain and difficulty swallowing <sup>[14]<\/sup><\/li>\n<li><strong>Pharynx cancer<\/strong>, causing a lumpy feeling in the throat or neck, bleeding, nasal obstruction, ear and throat pain, problems with swallowing and even deafness <sup>[15]<\/sup>.<\/li>\n<li><strong>Throat paralyses<\/strong> resulting from infectious diseases like diphtheria, rabies, and polio <sup>[12]<\/sup><\/li>\n<li><strong>Pharynx \u2018cobblestoning\u2019<\/strong> due to allergic rhinitis, characterized by streaks of lymphatic tissue, marking the back of the pharynx <sup>[16]<\/sup><\/li>\n<li><strong>Laryngopharyngeal reflux (LRP)<\/strong>, common in those suffering from GERD, occurs when the stomach acids get up to the throat from the esophagus<\/li>\n<\/ul>\n<div class=\"accordion\">\n\t<h3 class=\"panel-title\">References <\/h3>\n<div class=\"panel-content\"><ol><\/p>\n<ol>\n<li><a href=\"http:\/\/www.ncbi.nlm.nih.gov\/pubmedhealth\/PMHT0024473\/\">http:\/\/www.ncbi.nlm.nih.gov\/pubmedhealth\/PMHT0024473\/<\/a><\/li>\n<li><a href=\"http:\/\/emedicine.medscape.com\/article\/1949347-overview\">http:\/\/emedicine.medscape.com\/article\/1949347-overview<\/a><\/li>\n<li><a href=\"http:\/\/teachmeanatomy.info\/neck\/viscera\/pharynx\/\">http:\/\/teachmeanatomy.info\/neck\/viscera\/pharynx\/<\/a><\/li>\n<li><a href=\"http:\/\/biyaninursingcollege.com\/what-is-pharynx-its-position-structure-and-functions\/\">http:\/\/biyaninursingcollege.com\/what-is-pharynx-its-position-structure-and-functions\/<\/a><\/li>\n<li>https:\/\/www.dartmouth.edu\/~humananatomy\/part_8\/chapter_53.html<\/li>\n<li><a href=\"http:\/\/study.com\/academy\/lesson\/pharynx-anatomy-definition-quiz.html\">http:\/\/study.com\/academy\/lesson\/pharynx-anatomy-definition-quiz.html<\/a><\/li>\n<li>http:\/\/www.getbodysmart.com\/ap\/respiratorysystem\/pharynx\/regions\/tutorial.html<\/li>\n<li><a href=\"http:\/\/www.yorku.ca\/earmstro\/journey\/pharynx.html\">http:\/\/www.yorku.ca\/earmstro\/journey\/pharynx.html<\/a><\/li>\n<li>https:\/\/www.csuchico.edu\/~pmccaffrey\/\/syllabi\/SPPA342\/342unit3.html<\/li>\n<li><a href=\"https:\/\/www.kenhub.com\/en\/library\/anatomy\/muscles-and-walls-of-the-pharynx\">https:\/\/www.kenhub.com\/en\/library\/anatomy\/muscles-and-walls-of-the-pharynx<\/a><\/li>\n<li><a href=\"http:\/\/www.gpnotebook.co.uk\/simplepage.cfm?ID=x20091027230110724280\">http:\/\/www.gpnotebook.co.uk\/simplepage.cfm?ID=x20091027230110724280<\/a><\/li>\n<li><a href=\"https:\/\/www.britannica.com\/science\/pharynx\">https:\/\/www.britannica.com\/science\/pharynx<\/a><\/li>\n<li><a href=\"http:\/\/www.healthline.com\/health\/pharyngitis#Overview1\">http:\/\/www.healthline.com\/health\/pharyngitis#Overview1<\/a><\/li>\n<li><a href=\"http:\/\/www.merckmanuals.com\/professional\/ear,-nose,-and-throat-disorders\/oral-and-pharyngeal-disorders\/tonsillopharyngitis\">http:\/\/www.merckmanuals.com\/professional\/ear,-nose,-and-throat-disorders\/oral-and-pharyngeal-disorders\/tonsillopharyngitis<\/a><\/li>\n<li><a href=\"http:\/\/patient.info\/doctor\/pharyngeal-cancer\">http:\/\/patient.info\/doctor\/pharyngeal-cancer<\/a><\/li>\n<li><a href=\"http:\/\/emedicine.medscape.com\/article\/134825-overview\">http:\/\/emedicine.medscape.com\/article\/134825-overview<\/a><\/li>\n<li><a href=\"http:\/\/my.clevelandclinic.org\/services\/head-neck\/diseases-conditions\/hic-laryngopharyngeal-reflux-lpr\">http:\/\/my.clevelandclinic.org\/services\/head-neck\/diseases-conditions\/hic-laryngopharyngeal-reflux-lpr<\/a><\/li>\n<\/ol>\n<p><\/ol>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>What is the Pharynx Pharynx is the 4-5 inches long semicircular fibromuscular tube, commonly referred to as the throat [1] that connects the nasal cavity to the larynx, and the oral cavity to the esophagus [2, 3].<\/p>\n","protected":false},"author":1,"featured_media":158,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-157","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-upper-respiratory-tract"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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