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Related Concept Videos

Nose and Nasal Cavity01:24

Nose and Nasal Cavity

The nose is composed of an observable exterior segment (external nose) and an internal segment within the skull known as the nasal cavity (internal nose). The external nose, visible on the face, consists of a framework of bone and hyaline cartilage enveloped in skin and muscle and lined with a mucous membrane. This structure is supported by the frontal bone, nasal bones, and maxillary bone and is supplemented by a cartilaginous framework comprising the septal nasal cartilage, lateral nasal...
Anatomy of Respiratory System I: Upper Respiratory Tract01:29

Anatomy of Respiratory System I: Upper Respiratory Tract

The upper respiratory tract plays a vital role in the respiratory system, comprising several structures that facilitate air intake and prepare air for the lungs. It also serves as the first line of defense against pathogens and particles. This tract includes the nose and nasal cavity, the oral cavity, the paranasal sinuses, and the pharynx, each with specific functions and features.
Nose and nasal cavity
The nose and nasal cavity represent the main external openings of the respiratory tract.
Cranial Bones: Lateral View01:27

Cranial Bones: Lateral View

The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
Suctioning the Nasopharyngeal Airway01:29

Suctioning the Nasopharyngeal Airway

Nasopharyngeal suctioning is a procedure to remove secretions from the upper part of the respiratory tract that the patient cannot clear independently. It helps maintain airway patency and prevents complications such as aspiration pneumonia.
Equipment Required
Pharynx01:20

Pharynx

The pharynx, a tubular structure framed by skeletal muscle and lined with mucous membrane, extends continuously from the nasal cavities. It is segmented into three major areas: the nasopharynx, oropharynx, and laryngopharynx.
Nasopharynx
The nasopharynx, bordered by the conchae of the nasal cavity, serves exclusively as an air conduit. In its superior region, the pharyngeal tonsils or adenoids are located. These tonsils are clusters of lymphoid reticular tissue akin to a lymph node. The precise...

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Related Experiment Video

Updated: May 11, 2026

An Effective Manual Deboning Method To Prepare Intact Mouse Nasal Tissue With Preserved Anatomical Organization
15:40

An Effective Manual Deboning Method To Prepare Intact Mouse Nasal Tissue With Preserved Anatomical Organization

Published on: August 10, 2013

Chapter 1: Sinonasal anatomy and function.

Dustin M Dalgorf1, Richard J Harvey

  • 1Applied Medical Research Centre, St Vincent's Hospital, University of New South Wales, and Macquarie University, Darlinghurst, Sydney, Australia.

American Journal of Rhinology & Allergy
|May 29, 2013
PubMed
Summary
This summary is machine-generated.

Understanding the paranasal surgical box, a fixed anatomical framework, is crucial for safe and complete endoscopic sinus surgery. This concept ensures thorough dissection and optimal surgical outcomes.

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Endoscopic Septoplasty with Limited Two-line Resection: Minimally Invasive Surgery for Septal Deviation
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Last Updated: May 11, 2026

An Effective Manual Deboning Method To Prepare Intact Mouse Nasal Tissue With Preserved Anatomical Organization
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15:04

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Endoscopic Septoplasty with Limited Two-line Resection: Minimally Invasive Surgery for Septal Deviation
06:13

Endoscopic Septoplasty with Limited Two-line Resection: Minimally Invasive Surgery for Septal Deviation

Published on: June 20, 2018

Area of Science:

  • Otolaryngology
  • Endoscopic Sinus Surgery
  • Anatomy

Background:

  • Paranasal sinus surgery requires a precise understanding of anatomy for safety and completeness.
  • Anatomical variability can complicate surgical dissection and outcomes.
  • Fixed landmarks are essential for defining surgical limits.

Purpose of the Study:

  • To introduce and describe the concept of the paranasal surgical box and its vertical component.
  • To delineate the anatomical boundaries for safe and complete endoscopic sinus dissection.
  • To enhance surgical planning and execution in sinonasal procedures.

Main Methods:

  • Review of anatomical structures including nasal cartilages and turbinates.
  • Description of the paranasal surgical box and its boundaries (middle turbinate, orbital wall, skull base).
  • Definition of the vertical component for frontal recess dissection.

Main Results:

  • The paranasal surgical box provides defined limits for dissection, improving visualization and completeness.
  • Application of the surgical box concept ensures avoidance of complications like disconnected cells and mucoceles.
  • Facilitates maximal delivery of topical therapies post-operatively.

Conclusions:

  • The paranasal surgical box is a critical concept for safe, complete, and functional endoscopic sinus surgery.
  • Utilizing fixed anatomical landmarks enhances surgical precision and patient outcomes.
  • This anatomical framework aids in overcoming surgical challenges and optimizing post-operative care.