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Related Concept Videos

Cranial Bones: Lateral View01:27

Cranial Bones: Lateral View

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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...
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Cranial Bones: Superior and Posterior View01:14

Cranial Bones: Superior and Posterior View

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The superior view of the cranium shows the frontal and paired parietal bones.
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...
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Sutures of the Skull01:22

Sutures of the Skull

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The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
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Compact Bone01:27

Compact Bone

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Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
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Tooth Anatomy01:21

Tooth Anatomy

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The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
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Structural Joints: Cartilaginous Joints01:17

Structural Joints: Cartilaginous Joints

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As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
There are two types of cartilaginous joints:
Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary...
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Related Experiment Video

Updated: Mar 3, 2026

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A Rare Concha Variation: Coronal Cleft.

Serap Yucel1, Hediye Pinar Gunbey, Emre Gunbey

  • 1*Department of Radiology †Department of Otorhinolaryngology Head and Neck Surgery, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey.

The Journal of Craniofacial Surgery
|May 5, 2017
PubMed
Summary

This study identifies and describes coronal clefted concha, a rare nasal turbinate variation. Understanding these anatomical variations is crucial for safe and effective endoscopic sinus surgery.

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Area of Science:

  • Anatomy
  • Radiology
  • Otolaryngology

Background:

  • Nasal turbinates, or ethmoturbinals, are ridges from the fetal lateral nasal wall with vital functions.
  • Anatomical variations of nasal turbinates are infrequently documented.
  • Knowledge of nasal cavity anatomy is critical for surgical procedures.

Observation:

  • Three patients with coronal clefted concha were diagnosed using magnetic resonance imaging.
  • Computed tomography scans and nasal endoscopic examinations were performed.
  • This represents the first reported cases and radiological definition of concha cleft.

Findings:

  • Coronal clefted concha is a previously undescribed anatomical variation.
  • The study provides the first radiological definition of concha cleft.
  • Paucity of data exists regarding lateral nasal wall variations.

Implications:

  • Accurate anatomical understanding is vital for functional endoscopic sinus surgery.
  • Awareness of variations like coronal clefted concha aids in surgical planning.
  • This study highlights the need for further research into nasal turbinate variations.