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The nasopharynx is lined by respiratory epithelium that is pseudostratified, columnar, and ciliated. Polyps or mucus can obstruct the nasopharynx, as can congestion due to an upper respiratory infection. The auditory tube, which connects the middle ear to the pharynx, opens into the nasopharynx at the pharyngeal opening of the auditory tube ...
It is the largest air sinus in the body. [1] [3] It has a mean volume of about 10 ml. [1] [verification needed] It is situated within the body of the maxilla, [1] [3] [4] but may extend into its zygomatic and alveolar processes when large.
In vertebrate anatomy, the throat is the front part of the neck, internally positioned in front of the vertebrae. It contains the pharynx and larynx. An important section of it is the epiglottis, separating the esophagus from the trachea (windpipe), preventing food and drinks being inhaled into the lungs.
Paranasal sinuses are a group of four paired air-filled spaces that surround the nasal cavity. [1] The maxillary sinuses are located under the eyes; the frontal sinuses are above the eyes; the ethmoidal sinuses are between the eyes and the sphenoidal sinuses are behind the eyes.
2. It is not well tolerated by some children because it requires injection of barium into the nasopharynx through a nasal catheter. 3. The resolution (clarity of the image) is not nearly as good as nasopharyngoscopy. 4. Small or unilateral openings cannot be seen because the X-ray beam takes a sum of all the parts. 5.
An x-ray beam is angled at 45° to the orbitomeatal line. The rays pass from behind the head and are perpendicular to the radiographic plate. Another variation of the waters places the orbitomeatal line at a 37° angle to the image receptor. It is named after the American radiologist Charles Alexander Waters.
Nasal cavity anatomy. The term "nasal cavity" can refer to each of the two cavities of the nose, or to the two sides combined. CT scan in the coronal plane, showing the ostiomeatal complex (green area) The lateral wall of each nasal cavity mainly consists of the maxilla.
A few fibers of palatopharyngeus muscle sweep backward under cover of the Passavant's ridge and form a U-shaped sling of palatopharyngeal sphincter. When the soft palate is elevated it comes in contact with ridge, the two together closing pharyngeal isthmus between nasopharynx and oropharynx. [2]