Pharynx, nasal cavity and oral cavity at meredith college. The superior or uppermost part of the throat, the nasopharynx is the hollow space lying at the skull base 2, above the oral cavity, extending after the choanae or posterior. The importance of these in infective pathology in the region is emphasized. Nasopharynx definition of nasopharynx by medical dictionary. Normally this space is continuous with the space at the back of the mouth, but in swallowing it is shut off from the oropharynx by the soft palate pressing against the back wall. Hard and soft palates the inferior border sits about c2. It is closed during swallowing mainly by the raising of the. What you need to know about throat cancer webmd medical reference. It is therefore divisible into nasal, oral, and laryngeal parts. Boundary between zones of maxillary and glossopharyngeal nerves.
The human pharynx is conventionally divided into three sections. They are arranged as an inner layer of longitudinal muscles and an outer circular layer. The pharynx is a muscular tube lined with mucous membrane, and consists of the nasopharynx, the oropharynx and the laryngopharynx. Several of these subsites are very common locations for the development of head. Pharynx news newspapers books scholar jstor november 2015 learn how and when to remove this template message. Study nasopharynx, oropharynx and laryngopharynx flashcards from hannah meiklejohns class online, or in brainscapes iphone or android app.
Nasopharynx, oropharynx and laryngopharynx youtube. Nov 25, 2017 nasopharynx, oropharynx and laryngopharynx anatomy dissections. It is divided into nasopharynx, oropharynx, and laryngopharynx 3. Examination of the oropharynx, the nasopharynx, the laryngopharynx and larynx presents different problems each area will therefore be considered separately. The roof of the soft palate forms the inferior border of the nasopharynx and creates the junction between the nasopharynx and the oropharynx. The floor of the nasopharynx is the soft palate, and is curved and sloping. Clivus consists of part of the sphenoid bone behind the sinus, the tail end of the sella turcica and part of the occipital bone and forms the posterior border of the nasopharynx. Ethnic background and being exposed to the epsteinbarr virus can affect the risk of nasopharyngeal cancer.
In humans, two sets of pharyngeal muscles form the pharynx and determine the shape of its lumen. Adenoids are lymphoid tissue structures located in the posterior wall of the nasopharynx. The nasopharynx extends from the base of the skull to the upper surface of the soft palate. Posterior pharyngeal wall boundaries above communicates with nasopharynx through nasopharyngeal isthmus. Nasopharyngeal cancer is a type of head and neck cancer. The nasopharynx is 2 to 3 cm wide and 3 to 4 cm long and situated behind the nasal fossa inside the occipital bone. The oropharynx, nasopharynx, laryngopharynx and larynx. While the posterior wall of pharynx is smooth, the anterior wall is irregular because it is formed by the posterior nasal aperture, soft palate, oral cavity. Pharynx, nasopharynx, oropharynx, laryngopharynx flashcards. Nasal cavity nasopharynx oropharynx laryngopharynx boundaries external nares to the end of the hard palate, posteriorly superior to the soft palate, runs the length end of soft palate to the hyoid bone hyoid to the larynx associated structures external nares, vestibule, olfactory epithelium, hard palate, internal nares. Pharynx histology epithelial lining of the pharynx. The nasopharynx forms the superiormost part of the pharynx, in continuity with the inferior oropharynx, and the posterior continuation of the anterior nasal cavity. Oropharynx it is the middle part of the pharynx situated behind the oral cavity.
The oral cavity consists of the following two areas. The relationships of the naso and oropharynx are described together with the muscular wall of the pharynx. Oropharynx, laryngopharynx, and larynx netter images. The nasopharynx is, by definition, the upper part of the throat behind the nose. Walls and boundaries of the nasopharynx in the front, it has the posterior nares and the back part of the nasal septum 4. The pharynx is a space which opens anteriorly into the mouth and nasal duct, and posteriorly into the oesophagus and larynx. Epithelial lining of the pharynx introduction to pharynx histology the surface of the nasopharynx is covered by the same pseudostratified columnar epithelium that is found in the nasal cavity. Nasopharynx oropharynx laryngopharynx hypopharynx seen from lateral 33. Anything that increases your risk of getting a disease is called a risk factor. When it comes to sleep disorders like snoring and obstructive sleep apnea each of these has its own problems. Oral cavity mouth the entire oral cavity is lined with mucous membrane tissue. The pharynx connects the nose, mouth and throat to each other. Study 73 pharynx, nasal cavity and oral cavity flashcards from steph h. Inferiorly, the soft palate marks the boundary between the nasopharynx and the following section of the pharynx, oropharynx 1.
Functional anatomy and physiology of airway intechopen. The three parts of the pharynx are the nasopharynx, oropharynx, and hypopharynx. The hypopharynx begins as the continuation of the oropharynx at the pharyngoepiglottic fold which is at the level of the hyoid bone superiorly, and extends inferiorly to the level of the inferior aspect of the cricoid cartilage, where it continues as the cervical esophagus. The oropharynx includes the tonsils, tongue base, soft palate, and pharyngeal walls. For the purposes of simplicity, the nasopharynx is discussed in detail by itself. The pharynx extends from the base of the skull down to the inferior border of the cricoid cartilage around the c6 vertebral level, where it becomes continuous with the esophagus.
Essentially, it forms a continuous muscular passage for air, food, and liquids to travel down from your nose and mouth to your lungs and stomach. The human pharynx is part of the digestive system and also the. Nasopharynx, oropharynx and laryngopharynx anatomy dissections. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Start studying pharynx, nasopharynx, oropharynx, laryngopharynx. Anterior pillar or palatoglossal arch palatine tonsil. The nasopharynx is a cuboidal cavity formed by muscle and fascia with an epithelial mucosal covering. The communication of the nasopharynx with the auditory tube and the relationships of the aggregations of lymphatic tissue are described. In contextanatomylangen terms the difference between nasopharynx and pharynx is that nasopharynx is anatomy the nasal part of the pharynx, lying behind the nose and above the level of the soft palate while pharynx is anatomy the part of the alimentary canal that extends from the mouth and nasal cavities to the. Tongue pushes the food through the fauces into the oropharynx. Between the posterior border of the soft palate and the posterior wall of the pharynx there is an oblique interval, called the pharyngeal isthmus, through which the nasopharynx communicates with the oropharynx. In this section, you will examine the anatomy and functions of the three main organs of the upper alimentary canalthe mouth, pharynx, and esophagusas.
Why is the lining of the nasopharynx different from the oropharynx and the laryngopharynx. The nasopharynx is the upper part of your throat behind your nose. Gross anatomy the hypopharynx begins as the continuation of the. The oropharynx forms part of the pharynx, being the continuation of the oral cavity and. A lateral radiograph of the oropharyngeal region shows an air column in the nasopharynx, oropharynx and upper part of the laryngopharynx up to the lower border of laryngeal opening. Why is the lining of the nasopharynx different from the. You may not embed one of our images on your web page without a link back to our site. Nasopharynx behind the nasal cavity extends from skull base superiorly to the soft palate inferiorly communicates inferiorly with the oropharynx through the velopharyngeal sphincter the nasopharyngeal tonsil lies in the roof the pharyngeal opening of et lies in. The oropharynx forms part of the pharynx, being the continuation of the oral cavity and nasopharynx superiorly, and the larynx and hypopharynx inferiorly. On its lateral walls the nasopharynx communicates with the right and left tympanic cavities by the eustachian tubes. Nasal cavity nasopharynx oropharynx laryngopharynx boundaries. Eustachean tube passes through base of skull between foramen ovale and lacerum to reach nasopharynx. Oct 31, 2012 why is the lining of the nasopharynx different from the oropharynx and the laryngopharynx. In anatomylangen terms the difference between nasopharynx and oropharynx is that nasopharynx is anatomy the nasal part of the pharynx, lying behind the nose and above the level of the soft palate while oropharynx is anatomy the oral part of the pharynx, reaching from the uvula to the level of the hyoid bone.
Nov 18, 20 the walls of nasopharynx, oropharynx, and laryngopharynx are composed of four layers. Nasopharynx tumor confined to the nasopharynx, or extends to oropharynx andor nasal cavity without parapharyngeal extension tumor with parapharyngeal extension tumor involves bony structures of skull base andor paranasal sinuses tumor with intracranial extension andor involvement of involvement of cranial. The hypopharynx or laryngopharynx forms the most inferior portion of the pharynx, being the continuation of the oropharynx superiorly and both the larynx and esophagus inferiorly. The base of the tongue forms the anterior boundary of the oropharynx. Soft palate posterior pillar or palatopharyngeal arch. The pharynx is a hollow, muscular tube that is about cm 5 in long. Mar 18, 2018 the nasopharynx is the upper part of your throat behind your nose. The pharynx extends from the nasal cavity to the larynx and is arbitrarily. If you would like a large, unwatermarked image for your web page or.
The nasopharynx is superior to the other two subdivisions of the pharynx, the oropharynx and hypopharynx. The pharynx is the part of the digestive system situated posterior to the nasal and oral cavities and posterior to the larynx. Nasopharynx, oropharynx, laryngopharynx effects on snoring. Nasopharynx, oropharynx and laryngopharynx flashcards by. The nasopharynx is the first of the three sections forming the pharynx 1, the other two being the oropharynx and laryngopharynx. From internal luminal side to external, the layers are the mucosa, submucosa, muscle layer, and fibrosa. It is a passageway in the head and neck that is part of both the digestive system and the respiratory system. The nasopharynx is a noncollapsible tube, sited above the soft palate and posterior to the nasal cavity. If you would like a large, unwatermarked image for your web page or blog, please purchase the appropriate license. It starts in the nasopharynx, the upper part of the throat behind the nose and near the base of skull. In humans, the upper pharynx includes the nasal section divided off by the soft palate and the lower pharynx which includes the mouth and.
Oropharynx laryngopharynx nasopharynx oropharynx laryngopharynx nasopharynx from biol 2402 at houston community college. The anterior wall extends from the base of the skull to the upper surface of the soft palate. The nasopharynx is that part of the nasal passage that lies above the free border of the soft palate. It includes the mouth, the nose, the palate, the uvula, the pharynx, and the larynx. Jan 21, 2016 the oropharynx is the middle compartment of the pharynx, i. The roof of the nasopharynx curves inferiorly as it progresses posteriorly, and is continuous with the posterior wall of the oropharynx. Laryngo pharynx definition of laryngo pharynx by medical. It is a part of the pharynx, which comprises three separate segments.
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