What is ethmoid infundibulum?
The ethmoid infundibulum is a curved cleft of the ethmoid bone which leads into the anterior portion of the hiatus semilunaris. It is bordered medially by the uncinate process and laterally by the orbital plate of the ethmoid.
What are the boundaries of the nasal cavity?
Boundaries of the Nasal Cavity
- Sphenoethmoidal recess. The space between the superior nasal concha and the sphenoid bone, with openings from the sphenoid sinus.
- Superior meatus.
- Middle meatus.
- Inferior meatus.
- Sphenopalatine foramen.
What are the four paranasal sinuses and their location?
Paranasal sinuses are a group of four paired air-filled spaces that surround the nasal cavity. 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.
What is the function of the ethmoid?
The ethmoid bone is a cube-shaped bone located in the center of the skull between the eyes. It helps form the walls of the eye socket, or orbital cavity, as well as the roof, sides, and interior of the nasal cavity.
What are ethmoid sinuses?
A type of paranasal sinus (a hollow space in the bones around the nose). Ethmoid sinuses are found in the spongy ethmoid bone in the upper part of the nose between the eyes. They are lined with cells that make mucus to keep the nose from drying out.
What is external nose?
External nose. The external part of the nose consists of a root (superiorly), apex (inferiorly), dorsum, nares (nostrils) and the separating nasal septum. Bony component: nasal, maxillae and frontal bones. Cartilaginous component: alar cartilages (major, minor), lateral processes, septal cartilage. Nasal cavity.
Where are the ethmoid sinuses located within the ethmoid bone?
A type of paranasal sinus (a hollow space in the bones around the nose). Ethmoid sinuses are found in the spongy ethmoid bone in the upper part of the nose between the eyes.
Are there 2 ethmoid bones?
It is located at the roof of the nose, between the two orbits. The cubical bone is lightweight due to a spongy construction. The ethmoid bone is one of the bones that make up the orbit of the eye….
| Ethmoid bone | |
|---|---|
| FMA | 52740 |
| Anatomical terms of bone |
Can you feel your ethmoid bone?
The perpendicular plate of the ethmoid bone runs vertically and ends to form the first two-thirds of the nasal septum. It provides an attachment point for the septal cartilage we can feel between our nostrils. The perpendicular plate begins just under the cribriform plate.
What is the ethmoid infundibulum?
The trough that is formed lateral to the uncinate process, within the anterior ethmoid complex, is called the ethmoid infundibulum.
What are the borders of the ethmoid bone?
The ethmoid bone also has several borders, the most important being mentioned below: 1 Frontal lobe – anteriorly. 2 Sphenoid bone – posteriorly. 3 Vomer + Inferion nasal chonca – inferiorly.
What is the anterior aspect of the ethmoid?
The anterior aspect of ethmoid demonstrates this bone’s main parts: midline lamina perpendicularis extending upward as crista galli and lateral parts of this bone containing conchas and ethmoid cells, collectively called labyrinthus ethmoidalis .
What separates the ethmoid bulla from the uncinate process?
The hiatus semilunaris separates the ethmoid bulla and the uncinate process. It constitutes the connection between the frontal and maxillary sinuses to the anterior ethmoidal cells. Structure and landmarks of the ethmoid bone