{"id":2101,"date":"2020-09-07T09:30:34","date_gmt":"2020-09-07T09:30:34","guid":{"rendered":"https:\/\/meddists.com\/learn\/pre-clinical\/anatomy\/head-and-neck\/head\/nasal-cavity\/paranasal-air-sinuses\/"},"modified":"2021-10-02T20:18:45","modified_gmt":"2021-10-02T18:18:45","slug":"paranasal-air-sinuses","status":"publish","type":"page","link":"https:\/\/meddists.com\/learn\/pre-clinical\/anatomy\/skull-head-and-neck\/head\/nasal-cavity\/paranasal-air-sinuses\/","title":{"rendered":"Paranasal air sinuses"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><div class=\"intro\">The paranasal air sinuses are hollow pockets in bones surrounding the nasal cavity. The sinuses are named after the bone in which they are located.<\/div><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<figure class=\"wp-block-image\" id=\"attachment_16539\"><a href=\"https:\/\/meddists.com\/wp-content\/uploads\/2018\/02\/paranasal-air-sinuses.png\" target=\"_blank\" title=\"Paranasal air sinuses\"><img decoding=\"async\" src=\"https:\/\/meddists.com\/wp-content\/uploads\/2018\/02\/paranasal-air-sinuses-600x334.png\" alt=\"\" class=\"wp-image-16539\"\/><\/a><figcaption><strong>Figure 1. Paranasal air sinuses<\/strong>&nbsp;(Credit: Patrick J. Lynch, CC BY-SA 2.5)<\/figcaption><\/figure>\n\n\n\n<ol class=\"wp-block-list\"><li><strong>Frontal sinuses<\/strong><\/li><li><strong>Ethmoid air cells<\/strong><\/li><li><strong>Sphenoid sinuses<\/strong><\/li><li><strong>Maxillary sinuses<\/strong><\/li><\/ol>\n\n\n<span class=\"block-heading\" id=\"header_1\">\n<h4 class=\"wp-block-heading\" class=\"wp-block-heading\" class=\"title_collection title1\">Functions<\/h4>\n<\/span><span class=\"block-content\" id=\"contents_1\">\n\n\n<ul class=\"wp-block-list\"><li>Reduction of the weight of the skull<\/li><li>Provide vocal resonance<\/li><li>Provide a buffer against facial trauma<\/li><\/ul>\n\n\n<\/span><span class=\"block-heading\" id=\"header_2\">\n<h4 class=\"wp-block-heading\" class=\"wp-block-heading\" class=\"title_collection title1\">Sinuses and their drainage<\/h4>\n<\/span><span class=\"block-content\" id=\"contents_2\">\n\n\n<p class=\"wp-block-paragraph\">The sinuses are sealed except for a small opening through which air and fluids can pass. They are named after the bone they are located in.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"pure-table\"><thead><tr><th>Sinuses<\/th><th>Drains to<\/th><\/tr><\/thead><tbody><tr><td><strong>Frontal<\/strong><\/td><td>Middle nasal meatus<\/td><\/tr><tr><td><strong>Ethmoid air cells<\/strong><\/td><td>The anterior cells to the semilunar hiatus<br>The middle cells to the ethmoidal bulla<br>The posterior cells to the superior nasal meatus<\/td><\/tr><tr><td><strong>Sphenoid<\/strong><\/td><td>Sphenoethmoidal recesses<\/td><\/tr><tr><td><strong>Maxillary<\/strong><\/td><td>Middle nasal meatus through the semilunar hiatus<\/td><\/tr><\/tbody><\/table><figcaption><strong>Table 1. Drainage of the paranasal air sinuses<\/strong><\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image\" id=\"attachment_22685\"><a href=\"https:\/\/meddists.com\/wp-content\/uploads\/2020\/01\/nasal_sinuses.png\" target=\"_blank\" title=\"Paranasal air sinuses\"><img decoding=\"async\" src=\"https:\/\/meddists.com\/wp-content\/uploads\/2020\/01\/nasal_sinuses-600x528.png\" alt=\"\" class=\"wp-image-22685\"\/><\/a><figcaption><strong>Figure 2. Paranasal air sinuses and their drainage<\/strong><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The nasolacrimal duct serves as a drainage tube for the lacrimal secretions (tears) that open to the inferior nasal meatus.<\/p>\n\n\n<\/span><span class=\"block-heading\" id=\"header_3\">\n<h4 class=\"wp-block-heading\" class=\"wp-block-heading\" class=\"title_collection title1\">Clinical information<\/h4>\n<\/span><span class=\"block-content\" id=\"contents_3\">\n\n\n<ul class=\"wp-block-list\"><li>The blockage of a sinus drainage can cause inflammation and accumulation of fluid or pus within the sinus. This condition is known as\u00a0<strong>sinusitis<\/strong>.<\/li><li>At birth, these sinuses are not well-developed, but the sinuses grow in size with age, with the sphenoid and frontal sinuses developing last.<\/li><li>In some cases, the roots of the maxillary teeth (3rd to 8th) may reach the floor of the maxillary sinus, and in case of tooth extraction cause its perforation.<\/li><\/ul>\n<\/span><div id=\"the_titles\" style=\"display:none;\"><h4 class=\"wp-block-heading\" class=\"wp-block-heading\">Functions<\/h4><h4 class=\"wp-block-heading\" class=\"wp-block-heading\">Sinuses and their drainage<\/h4><h4 class=\"wp-block-heading\" class=\"wp-block-heading\">Clinical information<\/h4><\/div>","protected":false},"excerpt":{"rendered":"<p>Frontal sinuses Ethmoid air cells Sphenoid sinuses Maxillary sinuses Functions Reduction of the weight of the skull Provide vocal resonance Provide a buffer against facial trauma Sinuses and their drainage The sinuses are sealed except for a small opening through which air and fluids can pass. They are named after the bone they are located [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2099,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2101","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Paranasal air sinuses &#8211; Meddists<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/meddists.com\/learn\/pre-clinical\/anatomy\/skull-head-and-neck\/head\/nasal-cavity\/paranasal-air-sinuses\/\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/meddists.com\\\/learn\\\/pre-clinical\\\/anatomy\\\/skull-head-and-neck\\\/head\\\/nasal-cavity\\\/paranasal-air-sinuses\\\/\",\"url\":\"https:\\\/\\\/meddists.com\\\/learn\\\/pre-clinical\\\/anatomy\\\/skull-head-and-neck\\\/head\\\/nasal-cavity\\\/paranasal-air-sinuses\\\/\",\"name\":\"Paranasal air sinuses &#8211; 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