The medial surface of the
labyrinth of ethmoid
The ethmoidal labyrinth or lateral mass of the ethmoid bone consists of a number of thin-walled cellular cavities, the ethmoid air cells, arranged in three groups, anterior, middle, and posterior, and interposed between two vertical plates of bon ...
consists of a thin
lamella
Lamella (plural lamellae) means a small plate or flake in Latin, and in English may refer to:
Biology
* Lamella (mycology), a papery rib beneath a mushroom cap
* Lamella (botany)
* Lamella (surface anatomy), a plate-like structure in an animal
...
, which descends from the under surface of the
cribriform plate
In mammalian anatomy, the cribriform plate (Latin for lit. ''sieve-shaped''), horizontal lamina or lamina cribrosa is part of the ethmoid bone. It is received into the ethmoidal notch of the frontal bone and roofs in the nasal cavities. It supp ...
, and ends below in a free, convoluted margin, the middle nasal concha (middle nasal turbinate).
It is rough, and marked above by numerous grooves, directed nearly vertically downward from the cribriform plate; they lodge branches of the
olfactory nerves
The olfactory nerve, also known as the first cranial nerve, cranial nerve I, or simply CN I, is a cranial nerve that contains sensory nerve fibers relating to the sense of smell.
The afferent nerve fibers of the olfactory receptor neurons ...
, which are distributed to the
mucous membrane
A mucous membrane or mucosa is a membrane that lines various cavities in the body of an organism and covers the surface of internal organs. It consists of one or more layers of epithelial cells overlying a layer of loose connective tissue. It i ...
covering the
superior nasal concha
The superior nasal concha is a small, curved plate of bone representing a medial bony process of the labyrinth of the ethmoid bone. The superior nasal concha forms the roof of the superior nasal meatus.
Anatomy
Anatomical relations
The superi ...
.
Additional images
File:Illu nose nasal cavities.jpg, Nose and nasal cavities
File:Gray152.png, Ethmoid bone from the right side.
File:Gray196.png, Roof, floor, and lateral wall of left nasal cavity.
File:Gray780.png, The sphenopalatine ganglion and its branches.
File:Gray859.png, Coronal section of nasal cavities.
File:Gray994.png, Sagittal section of nose, mouth, pharynx, and larynx.
File:Nasenmuscheln1.JPG, Nasal conchae
See also
*
Nasal concha
In anatomy, a nasal concha (), plural conchae (), also called a nasal turbinate or turbinal, is a long, narrow, curled shelf of bone that protrudes into the breathing passage of the nose in humans and various animals. The conchae are shaped lik ...
References
External links
*
*
upstate.edu - Frontal* - lateral
* - coronal
*
Bones of the head and neck
{{musculoskeletal-stub